[Chromecast] Adding "chrome-resource://" scheme alias so that it can be accessed

by Backdrop.

This is inspired by kChromeSearchScheme under chrome/ code.

For background and details, please refer to internal bug and CL.

BUG=internal b/25327353

Review URL: https://codereview.chromium.org/1561053003

Cr-Commit-Position: refs/heads/master@{#367930}

9 files changed, 62 insertions, 5 deletions

diff --git a/chromecast/base/BUILD.gn b/chromecast/base/BUILD.gn
index 81c20ff..355c0da 100644
--- a/chromecast/base/BUILD.gn
+++ b/chromecast/base/BUILD.gn
@@ -14,6 +14,8 @@ source_set("base") {
     "android/system_time_change_notifier_android.cc",
     "android/system_time_change_notifier_android.h",
     "bind_to_task_runner.h",
+    "cast_constants.cc",
+    "cast_constants.h",
     "cast_paths.cc",
     "cast_paths.h",
     "cast_resource.cc",
diff --git a/chromecast/base/cast_constants.cc b/chromecast/base/cast_constants.cc
new file mode 100644
index 0000000..9caf71f
--- /dev/null
+++ b/chromecast/base/cast_constants.cc
@@ -0,0 +1,11 @@
+// Copyright 2016 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.
+
+#include "chromecast/base/cast_constants.h"
+
+namespace chromecast {
+
+const char kChromeResourceScheme[] = "chrome-resource";
+
+}  // namespace chromecast
diff --git a/chromecast/base/cast_constants.h b/chromecast/base/cast_constants.h
new file mode 100644
index 0000000..d65777f
--- /dev/null
+++ b/chromecast/base/cast_constants.h
@@ -0,0 +1,14 @@
+// Copyright 2016 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.
+
+#ifndef CHROMECAST_BASE_CAST_CONSTANTS_H_
+#define CHROMECAST_BASE_CAST_CONSTANTS_H_
+
+namespace chromecast {
+
+extern const char kChromeResourceScheme[];
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_BASE_CAST_CONSTANTS_H_
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index a703723..9f31a1e 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -19,6 +19,7 @@
 #include "base/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "cc/base/switches.h"
+#include "chromecast/base/cast_constants.h"
 #include "chromecast/base/cast_paths.h"
 #include "chromecast/base/cast_sys_info_util.h"
 #include "chromecast/base/chromecast_switches.h"
@@ -41,6 +42,7 @@
 #include "chromecast/public/cast_sys_info.h"
 #include "chromecast/service/cast_service.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_switches.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
@@ -325,6 +327,9 @@ int CastBrowserMainParts::PreCreateThreads() {
   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
                                  cast_browser_process_->cast_screen());
 #endif
+
+  content::ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
+      kChromeResourceScheme);
   return 0;
 }
 
diff --git a/chromecast/browser/cast_content_browser_client.cc b/chromecast/browser/cast_content_browser_client.cc
index 3021c9c..654a64a 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -16,6 +16,7 @@
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
+#include "chromecast/base/cast_constants.h"
 #include "chromecast/base/cast_paths.h"
 #include "chromecast/base/chromecast_switches.h"
 #include "chromecast/browser/cast_browser_context.h"
@@ -171,11 +172,12 @@ bool CastContentBrowserClient::IsHandledURL(const GURL& url) {
     return false;
 
   static const char* const kProtocolList[] = {
-      url::kBlobScheme,
-      url::kFileSystemScheme,
-      content::kChromeUIScheme,
-      content::kChromeDevToolsScheme,
-      url::kDataScheme,
+    content::kChromeUIScheme,
+    content::kChromeDevToolsScheme,
+    kChromeResourceScheme,
+    url::kBlobScheme,
+    url::kDataScheme,
+    url::kFileSystemScheme,
   };
 
   const std::string& scheme = url.scheme();
@@ -410,6 +412,11 @@ void CastContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
 
 #endif  // defined(OS_ANDROID)
 
+void CastContentBrowserClient::GetAdditionalWebUISchemes(
+    std::vector<std::string>* additional_schemes) {
+  additional_schemes->push_back(kChromeResourceScheme);
+}
+
 #if defined(OS_ANDROID) && defined(VIDEO_HOLE)
 content::ExternalVideoSurfaceContainer*
 CastContentBrowserClient::OverrideCreateExternalVideoSurfaceContainer(
diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index ff3805c..9ab3af7 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -152,6 +152,8 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
       int child_process_id,
       content::FileDescriptorInfo* mappings) override;
 #endif  // defined(OS_ANDROID)
+  void GetAdditionalWebUISchemes(
+      std::vector<std::string>* additional_schemes) override;
 #if defined(OS_ANDROID) && defined(VIDEO_HOLE)
   content::ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(
diff --git a/chromecast/chromecast.gyp b/chromecast/chromecast.gyp
index 3a6080e..4d78212 100644
--- a/chromecast/chromecast.gyp
+++ b/chromecast/chromecast.gyp
@@ -88,6 +88,8 @@
         'base/android/system_time_change_notifier_android.cc',
         'base/android/system_time_change_notifier_android.h',
         'base/bind_to_task_runner.h',
+        'base/cast_constants.cc',
+        'base/cast_constants.h',
         'base/cast_paths.cc',
         'base/cast_paths.h',
         'base/cast_resource.h',
diff --git a/chromecast/common/cast_content_client.cc b/chromecast/common/cast_content_client.cc
index b442fdd..2332ba6 100644
--- a/chromecast/common/cast_content_client.cc
+++ b/chromecast/common/cast_content_client.cc
@@ -9,10 +9,12 @@
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "build/build_config.h"
+#include "chromecast/base/cast_constants.h"
 #include "chromecast/base/version.h"
 #include "content/public/common/user_agent.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "url/url_util.h"
 
 namespace chromecast {
 namespace shell {
@@ -50,6 +52,10 @@ std::string BuildAndroidOsInfo() {
 }
 #endif
 
+const url::SchemeWithType kChromeResourceSchemeWithType = {
+  kChromeResourceScheme, url::SCHEME_WITHOUT_PORT
+};
+
 }  // namespace
 
 std::string GetUserAgent() {
@@ -73,6 +79,12 @@ std::string GetUserAgent() {
 CastContentClient::~CastContentClient() {
 }
 
+void CastContentClient::AddAdditionalSchemes(
+    std::vector<url::SchemeWithType>* standard_schemes,
+    std::vector<std::string>* savable_schemes) {
+  standard_schemes->push_back(kChromeResourceSchemeWithType);
+}
+
 std::string CastContentClient::GetUserAgent() const {
   return chromecast::shell::GetUserAgent();
 }
diff --git a/chromecast/common/cast_content_client.h b/chromecast/common/cast_content_client.h
index 8289f41..f77a610 100644
--- a/chromecast/common/cast_content_client.h
+++ b/chromecast/common/cast_content_client.h
@@ -17,6 +17,8 @@ class CastContentClient : public content::ContentClient {
   ~CastContentClient() override;
 
   // content::ContentClient implementation:
+  void AddAdditionalSchemes(std::vector<url::SchemeWithType>* standard_schemes,
+                            std::vector<std::string>* saveable_shemes) override;
   std::string GetUserAgent() const override;
   base::string16 GetLocalizedString(int message_id) const override;
   base::StringPiece GetDataResource(