Make a Memory Inspector Chrome App

This patch adds a Memory Inspector Chrome App which wraps the Memory
Inspector tool in a PNaCl executable.

Note that this patch is not ready for submission yet as it requires
several modifications to the Memory Inspector tool first (see the bug
below).

Any suggestions and/or feedback are more than welcome.

BUG=448399
NOTRY=true

Review URL: https://codereview.chromium.org/857553003

Cr-Commit-Position: refs/heads/master@{#312627}

22 files changed, 1676 insertions, 2 deletions

diff --git a/tools/memory_inspector/chrome_app/.gitignore b/tools/memory_inspector/chrome_app/.gitignore
new file mode 100644
index 0000000..89f9ac0
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/.gitignore
@@ -0,0 +1 @@
+out/
diff --git a/tools/memory_inspector/chrome_app/README.chromium b/tools/memory_inspector/chrome_app/README.chromium
new file mode 100644
index 0000000..8278303
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/README.chromium
@@ -0,0 +1,28 @@
+This directory contains the source code of the Memory Inspector Chrome App. The
+app runs the Memory Inspector inside PNaCl and can therefore be easily
+distributed without the Chromium tree. It uses several files from the naclports
+python package. Note that it requires the ADB daemon to be running on the host
+machine (run 'adb start-server').
+
+The app is built as follows (see build.sh for more details):
+
+  1. The output directory out/ is cleaned.
+  2. The contents of the template/ directory are copied/linked to
+     out/memory_inspector_app/.
+  3. Prebuilt files for running Python inside PNaCl are downloaded from
+     https://gsdview.appspot.com/naclports/ to out/memory_inspector_app/ and
+     out/memory_inspector_app/sandbox/.
+  4. The out/memory_inspector_app/sandbox/pydata_pnacl.tar file is augmented
+     with Memory Inspector dependencies (e.g. ../memory_inspector/).
+  5. The app can now be added to Chrome by loading the out/memory_inspector_app
+     folder as unpacked extension in chrome://extensions. A zip file
+     out/memory_inspector_app.zip is also generated for easy distribution.
+
+The app is currently (January 2015) in a very early stage of development. If you
+encounter any issues, please report them on https://crbug.com and use the Memory
+Inspector directly by running ../start_web_ui instead.
+
+For more information see:
+ - Meta-bug: https://crbug.com/448399
+ - naclports: https://code.google.com/p/naclports/
+
diff --git a/tools/memory_inspector/chrome_app/assets/body.svg b/tools/memory_inspector/chrome_app/assets/body.svg
new file mode 100644
index 0000000..07635d2
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/assets/body.svg
@@ -0,0 +1,272 @@
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+  <path
+     sodipodi:type="arc"
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diff --git a/tools/memory_inspector/chrome_app/assets/cog1.svg b/tools/memory_inspector/chrome_app/assets/cog1.svg
new file mode 100644
index 0000000..f80535f
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/assets/cog1.svg
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
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+   height="9.6800003"
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+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="cog1.svg">
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+        <dc:format>image/svg+xml</dc:format>
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diff --git a/tools/memory_inspector/chrome_app/assets/cog2.svg b/tools/memory_inspector/chrome_app/assets/cog2.svg
new file mode 100644
index 0000000..4f5094e
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/assets/cog2.svg
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
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diff --git a/tools/memory_inspector/chrome_app/assets/generate_bitmaps.sh b/tools/memory_inspector/chrome_app/assets/generate_bitmaps.sh
new file mode 100755
index 0000000..70f6d15
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/assets/generate_bitmaps.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+ASSETS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CHROME_APP_DIR="$(cd "${ASSETS_DIR}/.." && pwd)"
+IMAGES_DIR="$(cd "${CHROME_APP_DIR}/template/images" && pwd)"
+
+SRC_FILES=("icon.svg" "icon.svg" "icon.svg" "body.svg" "cog1.svg" "cog2.svg")
+DST_FILES=( \
+  "icon_16.png" "icon_48.png" "icon_128.png" "body.png" "cog1.png" "cog2.png")
+DST_SIZES=(16 48 128 300 60 30)
+
+# Generate bitmap images.
+for i in "${!SRC_FILES[@]}"; do
+  src_file="${ASSETS_DIR}/${SRC_FILES[$i]}"
+  dst_file="${IMAGES_DIR}/${DST_FILES[$i]}"
+  size="${DST_SIZES[$i]}"
+  echo "Generating ${dst_file}"
+  inkscape -z -e "${dst_file}" -w "${size}" -h "${size}" "${src_file}" > \
+    /dev/null
+done
+
diff --git a/tools/memory_inspector/chrome_app/assets/icon.svg b/tools/memory_inspector/chrome_app/assets/icon.svg
new file mode 100644
index 0000000..b295f8c
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/assets/icon.svg
@@ -0,0 +1,304 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="48"
+   height="48"
+   viewBox="0 0 48 48"
+   id="svg3070"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="android_icon.svg">
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+         rdf:about="">
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+    </rdf:RDF>
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+       inkscape:collect="always"
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diff --git a/tools/memory_inspector/chrome_app/build.sh b/tools/memory_inspector/chrome_app/build.sh
new file mode 100755
index 0000000..7d3e9dd
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/build.sh
@@ -0,0 +1,72 @@
+#!/bin/bash -e
+
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+CHROME_APP_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+MEMORY_INSPECTOR_DIR="$(cd "${CHROME_APP_DIR}/.." && pwd)"
+TEMPLATE_DIR="${CHROME_APP_DIR}/template"
+
+OUT_DIR="${1:-${CHROME_APP_DIR}/out}"
+APP_FOLDER_NAME="memory_inspector_app"
+APP_DIR="${OUT_DIR}/${APP_FOLDER_NAME}"
+SANDBOX_DIR="${APP_DIR}/sandbox"
+ZIP_FILE="${APP_DIR}.zip"
+
+# NaCl Python prebuilts URL.
+NACL_PREBUILTS_BASE_URL="https://gsdview.appspot.com/naclports/builds/pepper_40/trunk-154-geacd680/publish/python/pnacl"
+
+# Memory Inspector prebuilts bucket and destination folder.
+MEMORY_INSPECTOR_PREBUILTS_BUCKET="chromium-telemetry"
+MEMORY_INSPECTOR_PREBUILTS_DIR="${MEMORY_INSPECTOR_DIR}/prebuilts"
+
+# Memory Inspector dependencies and destination folder in the sandbox
+# filesystem.
+MEMORY_INSPECTOR_DEPS=( \
+  "memory_inspector/" "classification_rules/" "prebuilts/" "start_web_ui")
+MEMORY_INSPECTOR_DEPS_FOLDER="memory_inspector"
+
+
+# Delete existing app folder and zip file.
+rm "${APP_DIR}" -rf
+rm "${ZIP_FILE}" -f
+
+# Create a new app folder.
+mkdir -p "${APP_DIR}"
+
+# Link all files from the template/ folder.
+ln -s -t "${APP_DIR}" "${TEMPLATE_DIR}"/*
+
+# Download NaCl Python prebuilt files.
+wget "${NACL_PREBUILTS_BASE_URL}/naclprocess.js" -P "${APP_DIR}" --no-verbose
+wget "${NACL_PREBUILTS_BASE_URL}/python.nmf" -P "${SANDBOX_DIR}" --no-verbose
+wget "${NACL_PREBUILTS_BASE_URL}/python.pexe" -P "${SANDBOX_DIR}" --no-verbose
+wget "${NACL_PREBUILTS_BASE_URL}/pydata_pnacl.tar" -P "${SANDBOX_DIR}" \
+  --no-verbose
+
+# Download Memory Inspector prebuilt files.
+download_from_google_storage --directory "${MEMORY_INSPECTOR_PREBUILTS_DIR}" \
+  --bucket "${MEMORY_INSPECTOR_PREBUILTS_BUCKET}"
+
+# Add Memory Inspector dependencies to pydata_pnacl.tar.
+tmp_dir="$(mktemp -d)"
+(
+  cd "${tmp_dir}"
+  ln -s "${MEMORY_INSPECTOR_DIR}" "${MEMORY_INSPECTOR_DEPS_FOLDER}"
+  for dependency in "${MEMORY_INSPECTOR_DEPS[@]}"; do
+    tar --owner="memory-inspector:1002" --group="memory-inspector:1002" \
+        --append --dereference --file "${SANDBOX_DIR}/pydata_pnacl.tar" \
+        "${MEMORY_INSPECTOR_DEPS_FOLDER}/${dependency}"
+  done
+)
+rm "${tmp_dir}" -rf
+echo "Chrome app directory: ${APP_DIR}"
+
+# Zip the app.
+(
+  cd "${OUT_DIR}"
+  zip "${ZIP_FILE}" "${APP_FOLDER_NAME}" -r -q
+)
+echo "Chrome app zip file: ${ZIP_FILE}"
+
diff --git a/tools/memory_inspector/chrome_app/template/background.js b/tools/memory_inspector/chrome_app/template/background.js
new file mode 100644
index 0000000..7128ff1
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/background.js
@@ -0,0 +1,86 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+/**
+ * Singleton object representing the Memory Inspector Chrome App.
+ * @constructor
+ */
+var MemoryInspectorApp = function() {
+  this.window_ = undefined;
+};
+
+/** Main window parameters. */
+MemoryInspectorApp.WINDOW_URL = 'main_window.html';
+MemoryInspectorApp.WINDOW_ID = 'main';
+MemoryInspectorApp.WINDOW_WIDTH = Math.min(screen.width, 1200);
+MemoryInspectorApp.WINDOW_HEIGHT = Math.min(screen.height, 800);
+
+/**
+ * Launch the Memory Inspector. If it is already running, focus the main window.
+ */
+MemoryInspectorApp.prototype.launch = function() {
+  if (this.window_ === undefined) {
+    this.start_();
+  } else {
+    this.focus_();
+  }
+};
+
+/**
+ * Start the Memory Inspector by creating the main window.
+ * @private
+ */
+MemoryInspectorApp.prototype.start_ = function() {
+  var options = {
+    'id': MemoryInspectorApp.WINDOW_ID,
+    'bounds': {
+      'width': MemoryInspectorApp.WINDOW_WIDTH,
+      'height': MemoryInspectorApp.WINDOW_HEIGHT
+    },
+    'hidden': true  // The main window shows itself after it retrieves settings.
+  };
+  chrome.app.window.create(MemoryInspectorApp.WINDOW_URL, options,
+      this.onWindowCreated_.bind(this));
+};
+
+/**
+ * Listener called when the main window is created.
+ * @private
+ * @param {AppWindow} createdWindow The created window.
+ */
+MemoryInspectorApp.prototype.onWindowCreated_ = function(createdWindow) {
+  this.window_ = createdWindow;
+  this.window_.onClosed.addListener(this.onWindowClosed_.bind(this));
+};
+
+/**
+ * Listener called when the main window is closed.
+ * @private
+ */
+MemoryInspectorApp.prototype.onWindowClosed_ = function() {
+  this.window_ = undefined;
+};
+
+/**
+ * Focus the main window.
+ * @private
+ */
+MemoryInspectorApp.prototype.focus_ = function() {
+  if (this.window_ !== undefined) {
+    this.window_.focus();
+  }
+};
+
+window.addEventListener('load', function() {
+  // Create the singleton MemoryInspectorApp instance and hook it up with the
+  // app launcher.
+  var app = new MemoryInspectorApp();
+  chrome.app.runtime.onLaunched.addListener(app.launch.bind(app));
+
+  // Make the instance global for debugging purposes.
+  window.app = app;
+});
+
diff --git a/tools/memory_inspector/chrome_app/template/config.js b/tools/memory_inspector/chrome_app/template/config.js
new file mode 100644
index 0000000..ebf4e53
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/config.js
@@ -0,0 +1,30 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+/**
+ * Configuration for the Memory Inspector Chrome App.
+ */
+var MemoryInspectorConfig = {};
+
+/** The port on which the Python server process will listen. */
+MemoryInspectorConfig.PORT = 8089;
+
+/** The path to the Python NMF file. */
+MemoryInspectorConfig.NMF = '/sandbox/python.nmf';
+
+/** The command-line arguments for the Python server process. */
+MemoryInspectorConfig.ARGV = [
+    'python.nmf',
+    '/memory_inspector/start_web_ui',
+    '--port', MemoryInspectorConfig.PORT,
+    '--no-browser'];
+
+/** The environment variables for the Python server process. */
+MemoryInspectorConfig.ENV = ['NACL_DATA_URL=/sandbox/'];
+
+/** The current working directory of the Python server process. */
+MemoryInspectorConfig.CWD = '/';  // Relative to the virtual filesystem.
+
diff --git a/tools/memory_inspector/chrome_app/template/images/body.png b/tools/memory_inspector/chrome_app/template/images/body.png
new file mode 100644
index 0000000..7d86626
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/body.png
diff --git a/tools/memory_inspector/chrome_app/template/images/cog1.png b/tools/memory_inspector/chrome_app/template/images/cog1.png
new file mode 100644
index 0000000..9521e67
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/cog1.png
diff --git a/tools/memory_inspector/chrome_app/template/images/cog2.png b/tools/memory_inspector/chrome_app/template/images/cog2.png
new file mode 100644
index 0000000..d5989b9
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/cog2.png
diff --git a/tools/memory_inspector/chrome_app/template/images/icon_128.png b/tools/memory_inspector/chrome_app/template/images/icon_128.png
new file mode 100644
index 0000000..d437789
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/icon_128.png
diff --git a/tools/memory_inspector/chrome_app/template/images/icon_16.png b/tools/memory_inspector/chrome_app/template/images/icon_16.png
new file mode 100644
index 0000000..85c1589
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/icon_16.png
diff --git a/tools/memory_inspector/chrome_app/template/images/icon_48.png b/tools/memory_inspector/chrome_app/template/images/icon_48.png
new file mode 100644
index 0000000..aaa597c
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/images/icon_48.png
diff --git a/tools/memory_inspector/chrome_app/template/main_window.css b/tools/memory_inspector/chrome_app/template/main_window.css
new file mode 100644
index 0000000..d0db251
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/main_window.css
@@ -0,0 +1,247 @@
+/* Copyright 2015 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+body {
+  position: absolute;
+  padding: 0;
+  margin: 0;
+  height: 100%;
+  width: 100%;
+  overflow: hidden;
+}
+
+/******************************************************************************
+ * Terminal
+ ******************************************************************************/
+
+#terminal {
+  display: block;
+  position: absolute;
+  margin: 0;
+  padding: 3px;
+  width: calc(100% - 6px);
+  height: calc(25% - 6px);
+  overflow-x: hidden;
+  overflow-y: auto;
+  top: -25%;
+  left: 0;
+  z-index: 20;
+
+  background: #000000;
+
+  font-size: 12px;
+  font-family: 'DejaVu Sans Mono', 'Everson Mono', FreeMono, Menlo, Terminal,
+      monospace;
+  color: #FFFFFF;
+
+  -webkit-user-select: text;
+  user-select: text;
+
+  /* Animation for toggling the terminal. */
+  transition: top 0.2s ease-in-out;
+}
+
+body.terminal_visible #terminal {
+  top: 0;
+}
+
+.terminal_message_output {
+  /* Use default style. */
+}
+
+.terminal_message_info {
+  color: #06989A;
+}
+
+.terminal_message_error {
+  color: #FF0000;
+}
+
+#terminal_button {
+  display: block;
+  position: absolute;
+  padding: 5px 10px 10px 10px;
+  border-radius: 0 0 10px 10px;
+  width: 15px;
+  top: 0;
+  right: 50px;
+  z-index: 30;
+
+  background: #333333;
+  opacity: 0.5;
+
+  text-align: center;
+  font-size: 12px;
+  font-family: 'DejaVu Sans Mono', 'Everson Mono', FreeMono, Menlo, Terminal,
+      monospace;
+  font-weight: bold;
+  color: #AAAAAA;
+}
+
+#terminal_button:hover {
+  background: #555555;
+  color: #FFFFFF;
+  opacity: 0.7;
+}
+
+#terminal_button:active {
+  background: #777777;
+  color: #FFFFFF;
+  opacity: 0.7;
+}
+
+/******************************************************************************
+ * Contents
+ ******************************************************************************/
+
+#contents {
+  display: block;
+  position: absolute;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+  margin: 0;
+  padding: 0;
+
+  /* Animation for toggling the terminal. */
+  transition: height 0.2s ease-in-out, top 0.2s ease-in-out;
+}
+
+body.terminal_visible #contents {
+  top: 25%;
+  height: 75%;
+}
+
+#inspector_view {
+  display: block;
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  padding: 0;
+  margin: 0;
+  z-index: 0;
+  visibility: none;
+}
+
+body.inspector_view_visible #inspector_view {
+  visibility: visible;
+}
+
+#load_overlay {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  padding: 0;
+  margin: 0;
+  z-index: 10;
+  background: #DDDDDD;
+
+  /* Fade out animation. */
+  transition: visibility 0s linear 0.2s, opacity 0.2s linear;
+}
+
+body.inspector_view_visible #load_overlay {
+  visibility: none;
+  pointer-events: none;
+  opacity: 0;
+}
+
+/******************************************************************************
+ * Load message
+ ******************************************************************************/
+
+#load_message {
+  display: block;
+  position: absolute;
+
+  /* Center the loading screen. */
+  top: 50%;
+  left: 50%;
+  transform: translateY(-50%) translateX(-50%);
+
+  font-family: Helvetica, Arial, sans-serif;
+  text-align: center;
+}
+
+#load_message_title {
+  margin-top: -12px;
+  margin-bottom: 12px;
+  color: #0073EA;
+  font-weight: bold;
+  font-size: 20px;
+}
+
+#load_dots,
+#phantom_load_dots {
+  display: inline-block;
+  width: 3em;
+  text-align: left;
+}
+
+#load_message_subtitle {
+  color: gray;
+  font-style: italic;
+  font-size: 12px;
+}
+
+/******************************************************************************
+ * Load animation
+ ******************************************************************************/
+
+#load_animation {
+  display: inline-block;
+  position: relative;
+  padding: 0;
+  width: 300px;
+  height: 300px;
+  overflow: hidden;
+}
+
+#load_animation_body {
+  position: absolute;
+  top: 0;
+  left: 0;
+}
+
+#load_animation_cog1 {
+  position: absolute;
+  top: 125px;
+  left: 109px;
+
+  -webkit-animation: clockwise_spin 2s linear infinite;
+  animation: clockwise_spin 2s linear infinite;
+}
+
+#load_animation_cog2 {
+  position: absolute;
+  top: 168px;
+  left: 159px;
+
+  -webkit-animation: counterclockwise_spin 1s linear infinite;
+  animation: counterclockwise_spin 1s linear infinite;
+}
+
+@-webkit-keyframes clockwise_spin {
+  100% {
+    transform: rotate(360deg);
+  }
+}
+@keyframes clockwise_spin {
+  100% {
+    transform: rotate(360deg);
+  }
+}
+
+@-webkit-keyframes counterclockwise_spin {
+  100% {
+    transform: rotate(-360deg);
+  }
+}
+@keyframes counterclockwise_spin {
+  100% {
+    transform: rotate(-360deg);
+  }
+}
+
diff --git a/tools/memory_inspector/chrome_app/template/main_window.html b/tools/memory_inspector/chrome_app/template/main_window.html
new file mode 100644
index 0000000..a876e03
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/main_window.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!--
+Copyright 2015 The Chromium Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+-->
+<html>
+  <head>
+    <title>Memory Inspector</title>
+    <script type="text/javascript" src="naclprocess.js"></script>
+    <script type="text/javascript" src="config.js"></script>
+    <script type="text/javascript" src="main_window.js"></script>
+    <link rel="stylesheet" type="text/css" href="main_window.css">
+  </head>
+  <body>
+    <a id="terminal_button">&gt;_</a>
+    <div id="terminal">
+    </div>
+    <div id="contents">
+      <div id="load_overlay">
+        <div id="load_message">
+          <div id="load_animation">
+            <img id="load_animation_body" src="images/body.png" alt=""></img>
+            <img id="load_animation_cog1" src="images/cog1.png" alt=""></img>
+            <img id="load_animation_cog2" src="images/cog2.png" alt=""></img>
+          </div>
+          <div id="load_message_title">
+            <span id="phantom_load_dots"></span>Loading<span id="load_dots"></span>
+          </div>
+          <div id="load_message_subtitle">
+            This usually takes around 5 seconds but may take up to a minute after a fresh installation or an update
+          </div>
+        </div>
+      </div>
+      <webview id="inspector_view"></webview>
+    </div>
+  </body>
+</html>
diff --git a/tools/memory_inspector/chrome_app/template/main_window.js b/tools/memory_inspector/chrome_app/template/main_window.js
new file mode 100644
index 0000000..fc9e124
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/main_window.js
@@ -0,0 +1,393 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+/**
+ * Singleton object representing the main window of the Memory Inspector Chrome
+ * App.
+ * @constructor
+ */
+var MemoryInspectorWindow = function() {
+  // HTML elements in the window.
+  this.terminalElement_ = undefined;
+  this.terminalButtonElement_ = undefined;
+  this.contentsElement_ = undefined;
+  this.inspectorViewElement_ = undefined;
+  this.loadOverlayElement_ = undefined;
+  this.loadMessageElement_ = undefined;
+  this.loadDotsElement_ = undefined;
+  this.phantomLoadDots_ = undefined;
+
+  // Dots animation.
+  this.loadDotsAnimationIntervalId_ = undefined;
+
+  // Process manager.
+  this.processManager_ = undefined;
+
+  // Terminal.
+  this.terminalVisible_ = false;
+};
+
+/** The threshold for terminal auto-scroll. */
+MemoryInspectorWindow.AUTOSCROLL_THRESHOLD = 10;
+
+/** The interval between steps of the loading dots animation (milliseconds). */
+MemoryInspectorWindow.LOAD_DOTS_ANIMATION_INTERVAL = 500;
+
+/** The maximum number of dots in the loading dots animation. */
+MemoryInspectorWindow.MAX_LOAD_DOTS_COUNT = 3;
+
+/** The interval between polls to the backend server (milliseconds). */
+MemoryInspectorWindow.POLL_INTERVALL = 500;
+
+/**
+ * Initialize the main window. It will be shown once settings are retrieved
+ * (asynchronous request).
+ * @private
+ */
+MemoryInspectorWindow.prototype.initialize = function() {
+  this.setUpGui_();
+  this.startServerProcess_();
+  this.retrieveSettings_();
+  this.pollServer_();
+};
+
+/**
+ * Set up the main window. This method retrieves relevant HTML elements, adds
+ * corresponding event handlers, and starts animations.
+ * @private
+ */
+MemoryInspectorWindow.prototype.setUpGui_ = function() {
+  // Retrieve HTML elements in the window.
+  this.terminalElement_ = document.getElementById('terminal');
+  this.terminalButtonElement_ = document.getElementById('terminal_button');
+  this.contentsElement_ = document.getElementById('contents');
+  this.inspectorViewElement_ = document.getElementById('inspector_view');
+  this.loadOverlayElement_ = document.getElementById('load_overlay');
+  this.loadMessageElement_ = document.getElementById('load_message');
+  this.loadDotsElement_ = document.getElementById('load_dots');
+  this.phantomLoadDotsElement_ = document.getElementById('phantom_load_dots');
+
+  // Hook up the terminal toggle button.
+  this.terminalButtonElement_.addEventListener('click',
+      this.toggleTerminal_.bind(this));
+
+  // Print app name and version in the terminal.
+  var manifest = chrome.runtime.getManifest();
+  this.printInfo_(manifest.name + ' (version ' + manifest.version + ')\n');
+
+  // Start the loading dots animation.
+  this.loadDotsAnimationIntervalId_ = window.setInterval(
+      this.animateLoadDots_.bind(this),
+      MemoryInspectorWindow.LOAD_DOTS_ANIMATION_INTERVAL);
+};
+
+/**
+ * Toggle the terminal.
+ * @private
+ */
+MemoryInspectorWindow.prototype.toggleTerminal_ = function() {
+  if (this.terminalVisible_) {
+    this.hideTerminal_();
+  } else {
+    this.showTerminal_();
+  }
+  this.storeSettings_();
+};
+
+/**
+ * Show the terminal.
+ * @private
+ */
+MemoryInspectorWindow.prototype.showTerminal_ = function() {
+  // Scroll to the bottom.
+  this.terminalElement_.scrollTop = terminal.scrollHeight;
+  document.body.classList.add('terminal_visible');
+  this.terminalVisible_ = true;
+};
+
+/**
+ * Hide the terminal.
+ * @private
+ */
+MemoryInspectorWindow.prototype.hideTerminal_ = function() {
+  document.body.classList.remove('terminal_visible');
+  this.terminalVisible_ = false;
+};
+
+/**
+ * Stop the loading dots animation.
+ * @private
+ */
+MemoryInspectorWindow.prototype.stopLoadDotsAnimation_ = function() {
+  window.clearInterval(this.loadDotsAnimationIntervalId_);
+  this.loadDotsAnimationIntervalId_ = undefined;
+};
+
+/**
+ * Animate the loading dots.
+ * @private
+ */
+MemoryInspectorWindow.prototype.animateLoadDots_ = function() {
+  if (this.loadDotsElement_.innerText.length >=
+      MemoryInspectorWindow.MAX_LOAD_DOTS_COUNT) {
+    this.loadDotsElement_.innerText = '.';
+  } else {
+    this.loadDotsElement_.innerText += '.';
+  }
+};
+
+/**
+ * Start the server process inside PNaCl.
+ * @private
+ */
+MemoryInspectorWindow.prototype.startServerProcess_ = function() {
+  // Create and hook up a NaCl process manager.
+  var mgr = this.processManager = new NaClProcessManager();
+  mgr.setStdoutListener(this.onServerStdout_.bind(this));
+  mgr.setErrorListener(this.onServerError_.bind(this));
+  mgr.setRootProgressListener(this.onServerProgress_.bind(this));
+  mgr.setRootLoadListener(this.onServerLoad_.bind(this));
+
+  // Set dummy terminal size.
+  // (see https://code.google.com/p/naclports/issues/detail?id=186)
+  mgr.onTerminalResize(200, 200);
+
+  // Spawn the server process.
+  this.printInfo_('Spawning ' + MemoryInspectorConfig.ARGV.join(' ') + '\n');
+  mgr.spawn(
+      MemoryInspectorConfig.NMF,
+      MemoryInspectorConfig.ARGV,
+      MemoryInspectorConfig.ENV,
+      MemoryInspectorConfig.CWD,
+      'pnacl',
+      null /* parent */,
+      this.onServerProcessSpawned_.bind(this));
+};
+
+/**
+ * Listener called when the server process is spawned.
+ * @private
+ * @param {number} pid The PID of the spawned server process or error code if
+ *     negative.
+ */
+MemoryInspectorWindow.prototype.onServerProcessSpawned_ = function(pid) {
+  this.processManager.waitpid(pid, 0, this.onServerProcessExit_.bind(this));
+};
+
+/**
+ * Listener called when the server process exits.
+ * @private
+ * @param {number} pid The PID of the server process or an error code on error.
+ * @param {number} status The exit code of the server process.
+ */
+MemoryInspectorWindow.prototype.onServerProcessExit_ = function(pid, status) {
+  this.printInfo_('NaCl module exited with status ' + status + '\n');
+};
+
+/**
+ * Listener called when an stdout event is received from the server process.
+ * @private
+ * @param {string} msg The string sent to stdout.
+ */
+MemoryInspectorWindow.prototype.onServerStdout_ = function(msg) {
+  this.printOutput_(msg);
+};
+
+/**
+ * Listener called when an error event is received from the server process.
+ * @private
+ * @param {string} cmd The name of the process with the error.
+ * @param {string} err The error message.
+ */
+MemoryInspectorWindow.prototype.onServerError_ = function(cmd, err) {
+  this.printError_(cmd + ': ' + err + '\n');
+};
+
+/**
+ * Listener called when a part of the server NaCl module has been loaded.
+ * @private
+ * @param {string} url The URL that is being loaded.
+ * @param {boolean} lengthComputable Is our progress quantitatively measurable?
+ * @param {number} loaded The number of bytes that have been loaded.
+ * @param {number} total The total number of bytes to be loaded.
+ */
+MemoryInspectorWindow.prototype.onServerProgress_ = function(url,
+    lengthComputable, loaded, total) {
+  if (url === undefined) {
+    return;
+  }
+
+  var message = 'Loading ' + url.substring(url.lastIndexOf('/') + 1);
+  if (lengthComputable && total > 0) {
+    var percentLoaded = Math.round(loaded / total * 100);
+    var kbLoaded = Math.round(loaded / 1024);
+    var kbTotal = Math.round(total / 1024);
+    message += ' [' + kbLoaded + '/' + kbTotal + ' KiB ' + percentLoaded + '%]';
+  }
+  this.printInfo_(message + '\n');
+};
+
+/**
+ * Listener called when the server NaCl module has been successfully loaded.
+ * @private
+ */
+MemoryInspectorWindow.prototype.onServerLoad_ = function() {
+  this.printInfo_('NaCl module loaded\n');
+};
+
+/**
+ * Print an output message in the terminal.
+ * @private
+ * @param {string} msg The text of the message.
+ */
+MemoryInspectorWindow.prototype.printOutput_ = function(msg) {
+  this.printMessage_(msg, 'terminal_message_output');
+};
+
+/**
+ * Print an info message in the terminal.
+ * @private
+ * @param {string} msg The text of the message.
+ */
+MemoryInspectorWindow.prototype.printInfo_ = function(msg) {
+  this.printMessage_(msg, 'terminal_message_info');
+};
+
+/**
+ * Print an error message in the terminal.
+ * @private
+ * @param {string} msg The text of the message.
+ */
+MemoryInspectorWindow.prototype.printError_ = function(msg) {
+  this.printMessage_(msg, 'terminal_message_error');
+};
+
+/**
+ * Print a message of a given type in the terminal.
+ * @private
+ * @param {string} msg The text of the message.
+ * @param {string} cls The CSS class of the message.
+ */
+MemoryInspectorWindow.prototype.printMessage_ = function(msg, cls) {
+  // Determine whether we are at the bottom of the terminal.
+  var scrollBottom = this.terminalElement_.scrollTop +
+      this.terminalElement_.clientHeight;
+  var autoscrollBottomMin = this.terminalElement_.scrollHeight -
+      MemoryInspectorWindow.AUTOSCROLL_THRESHOLD;
+  var shouldScroll = scrollBottom >= autoscrollBottomMin;
+
+  // Append the message to the terminal.
+  var messageElement = document.createElement('span');
+  messageElement.innerText = msg;
+  messageElement.classList.add(cls);
+  this.terminalElement_.appendChild(messageElement);
+
+  // If we were at the bottom of the terminal, scroll to the bottom again.
+  if (shouldScroll) {
+    this.terminalElement_.scrollTop = this.terminalElement_.scrollHeight;
+  }
+};
+
+/**
+ * Asynchronously retrieve main window settings from local storage.
+ * @private
+ */
+MemoryInspectorWindow.prototype.retrieveSettings_ = function() {
+  chrome.storage.local.get('terminal_visible',
+      this.onSettingsRetrieved_.bind(this));
+};
+
+/**
+ * Asynchronously store main window settings in local storage.
+ * @private
+ */
+MemoryInspectorWindow.prototype.storeSettings_ = function() {
+  var settings = {};
+  settings['terminal_visible'] = this.terminalVisible_;
+  chrome.storage.local.set(settings);
+};
+
+/**
+ * Listener called when main window settings were retrieved from local storage.
+ * It saves them and finally shows the app window.
+ * @private
+ * @param {Object.<string, *>} settings The retrieved settings.
+ */
+MemoryInspectorWindow.prototype.onSettingsRetrieved_ = function(settings) {
+  if (chrome.runtime.lastError === undefined && settings['terminal_visible']) {
+    // Skip CSS animations by temporarily hiding everything.
+    document.body.style.display = 'none';
+    this.showTerminal_();
+    document.body.style.display = 'block';
+  }
+
+  // We are finally ready to show the window.
+  chrome.app.window.current().show();
+};
+
+/**
+ * Keep polling the backend server until it is reachable. The requests are
+ * asynchronous.
+ * @private
+ */
+MemoryInspectorWindow.prototype.pollServer_ = function() {
+  var requestUrl = 'http://127.0.0.1:' + MemoryInspectorConfig.PORT +
+      '?timestamp=' + new Date().getTime();
+  var request = new XMLHttpRequest();
+  request.addEventListener('readystatechange',
+      this.onPollRequestStateChange_.bind(this, request));
+  request.open('GET', requestUrl);
+  request.send();
+};
+
+/**
+ * Listener called when the state of the server request changes. If the request
+ * is complete and successful, the inspector view is navigated to the server.
+ * If unsuccessful, the request is repeated. Incomplete requests are ignored.
+ * @private
+ * @param {XMLHttpRequest} request The request.
+ */
+MemoryInspectorWindow.prototype.onPollRequestStateChange_ = function(request) {
+  // We wait until the request is complete.
+  if (request.readyState !== XMLHttpRequest.DONE) {
+    return;
+  }
+
+  // If the request was not successful, try again.
+  if (request.status !== 200) {
+    console.log('Inspector server unreachable. Trying again...');
+    setTimeout(this.pollServer_.bind(this),
+        MemoryInspectorWindow.POLL_INTERVALL);
+    return;
+  }
+
+  // Stop the animation, load the inspector, and display it.
+  console.log('Inspector server ready. Loading the inspector view...');
+  this.inspectorViewElement_.addEventListener('loadstop',
+      this.onInspectorLoaded_.bind(this));
+  this.inspectorViewElement_.src = 'http://127.0.0.1:' +
+      MemoryInspectorConfig.PORT;
+};
+
+/**
+ * Listener called when the inspector is loaded. It stops the loading dots
+ * animation, shows the inspector view, and fades out the loading overlay.
+ * @private
+ */
+MemoryInspectorWindow.prototype.onInspectorLoaded_ = function() {
+  this.stopLoadDotsAnimation_();
+  document.body.classList.add('inspector_view_visible');
+};
+
+window.addEventListener('load', function() {
+  // Create the singleton MemoryInspectorWindow instance and initialize it.
+  var mainWindow = new MemoryInspectorWindow();
+  mainWindow.initialize();
+
+  // Make the instance global for debugging purposes.
+  window.mainWindow = mainWindow;
+});
+
diff --git a/tools/memory_inspector/chrome_app/template/manifest.json b/tools/memory_inspector/chrome_app/template/manifest.json
new file mode 100644
index 0000000..a88b39f
--- /dev/null
+++ b/tools/memory_inspector/chrome_app/template/manifest.json
@@ -0,0 +1,35 @@
+{
+  "name": "Memory Inspector",
+  "description": "Memory inspector tool for Android",
+  "version": "0.1.0",
+  "manifest_version": 2,
+  "icons": {
+    "16": "images/icon_16.png",
+    "48": "images/icon_48.png",
+    "128": "images/icon_128.png"
+  },
+  "app": {
+    "background": {
+      "scripts": [
+        "background.js"
+      ]
+    }
+  },
+  "permissions": [
+    "storage",
+    "system.storage",
+    "unlimitedStorage",
+    "fileSystem",
+    "webview",
+    {
+      "socket": [
+        "tcp-listen:*:*",
+        "tcp-connect",
+        "resolve-host",
+        "udp-bind:*:*",
+        "udp-send-to:*:*"
+      ]
+    },
+    "http://127.0.0.1:*/*"
+  ]
+}
diff --git a/tools/memory_inspector/memory_inspector/frontends/www_server.py b/tools/memory_inspector/memory_inspector/frontends/www_server.py
index f8368fb..9e7e604 100644
--- a/tools/memory_inspector/memory_inspector/frontends/www_server.py
+++ b/tools/memory_inspector/memory_inspector/frontends/www_server.py
@@ -753,7 +753,8 @@ def Start(http_port):
     for k, v in _persistent_storage.LoadSettings(backend.name).iteritems():
       backend.settings[k] = v
 
-  httpd = wsgiref.simple_server.make_server('', http_port, _HttpRequestHandler)
+  httpd = wsgiref.simple_server.make_server(
+      '127.0.0.1', http_port, _HttpRequestHandler)
   try:
     httpd.serve_forever()
   except KeyboardInterrupt:
diff --git a/tools/memory_inspector/start_web_ui b/tools/memory_inspector/start_web_ui
index 2c16b64..3d0f8d8 100755
--- a/tools/memory_inspector/start_web_ui
+++ b/tools/memory_inspector/start_web_ui
@@ -34,5 +34,5 @@ if __name__ == '__main__':
   print 'Serving on port %d' % options.port
   if not options.no_browser:
     import webbrowser
-    webbrowser.open('http://localhost:%d' % options.port)
+    webbrowser.open('http://127.0.0.1:%d' % options.port)
   www_server.Start(options.port)