Revert of Implement webview.captureVisibleRegion() (patchset #9 id:160001 of https://codereview.chromium.org/1582053002/ )

Reason for revert:
The test WebViewAPITest.TestCaptureVisibleRegion is failing on several windows bots:

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/45040
https://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/builds/42690
https://build.chromium.org/p/chromium.win/builders/Vista%20Tests%20%281%29/builds/64394

Original issue's description:
> Implement webview.captureVisibleRegion()
>
> This CL implements  webview.captureVisibleRegion(), an extension/apps
> API to allow WebView users to capture screenshots of the contents
> displayed in a WebView. The surfaces contents capture has been plumbed
> via RenderWidgetHostViewChildFrame so this implementation should not
> require changes when WebView switches to using OOPIF.
>
> As part of the implementation, there are two notable refactors:
>
> 1) CaptureWebContentsFunction has been refactored into
> WebContentsCaptureClient to remove the extensions::AsyncExtensionFunction
> dependence so that this code can be used by both tabs.captureVisibleTab
> and webview.captureVisibleRegion, and
>
> 2) common code from DelegatedFrameHost has ben moved to
> content/browser/compositor/surface_utils.* in order to avoid duplication
> as both DelegatedFrameHost and RenderWidgetHostViewChildFrame now
> use the code.
>
> BUG=326755
>
> Committed: https://crrev.com/5b8cdcc82fc9da7bab15fd3dbf65df843dc73589
> Cr-Commit-Position: refs/heads/master@{#370565}

TBR=rockot@chromium.org,creis@chromium.org,kenrb@chromium.org,nick@chromium.org,fsamuel@chromium.org,wjmaclean@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=326755

Review URL: https://codereview.chromium.org/1614703003

Cr-Commit-Position: refs/heads/master@{#370641}

3 files changed, 0 insertions, 33 deletions

diff --git a/extensions/renderer/resources/extensions_renderer_resources.grd b/extensions/renderer/resources/extensions_renderer_resources.grd
index b4f5dad..bad8e29 100644
--- a/extensions/renderer/resources/extensions_renderer_resources.grd
+++ b/extensions/renderer/resources/extensions_renderer_resources.grd
@@ -61,7 +61,6 @@
       <include name="IDR_WEB_VIEW_ATTRIBUTES_JS" file="guest_view/web_view/web_view_attributes.js" type="BINDATA" />
       <include name="IDR_WEB_VIEW_CONSTANTS_JS" file="guest_view/web_view/web_view_constants.js" type="BINDATA" />
       <include name="IDR_WEB_VIEW_EVENTS_JS" file="guest_view/web_view/web_view_events.js" type="BINDATA" />
-      <include name="IDR_WEB_VIEW_EXPERIMENTAL_JS" file="guest_view/web_view/web_view_experimental.js" type="BINDATA" />
       <include name="IDR_WEB_VIEW_IFRAME_JS" file="guest_view/web_view/web_view_iframe.js" type="BINDATA" />
       <include name="IDR_WEB_VIEW_INTERNAL_CUSTOM_BINDINGS_JS" file="guest_view/web_view/web_view_internal.js" type="BINDATA" />
       <include name="IDR_WEB_VIEW_JS" file="guest_view/web_view/web_view.js" type="BINDATA" />
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view.js b/extensions/renderer/resources/guest_view/web_view/web_view.js
index d55249f..6dd4fae 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view.js
@@ -31,11 +31,6 @@ WebViewImpl.setupElement = function(proto) {
   // Public-facing API methods.
   var apiMethods = WebViewImpl.getApiMethods();
 
-  // Add the experimental API methods, if available.
-  var experimentalApiMethods =
-      WebViewImpl.maybeGetExperimentalApiMethods();
-  apiMethods = $Array.concat(apiMethods, experimentalApiMethods);
-
   // Create default implementations for undefined API methods.
   var createDefaultApiMethod = function(m) {
     return function(var_args) {
@@ -225,9 +220,6 @@ WebViewImpl.prototype.makeElementFullscreen = function() {
 // Implemented when the ChromeWebView API is available.
 WebViewImpl.prototype.maybeSetupContextMenus = function() {};
 
-// Implemented when the experimental WebView API is available.
-WebViewImpl.maybeGetExperimentalApiMethods = function() { return []; };
-
 GuestViewContainer.registerElement(WebViewImpl);
 
 // Exports.
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_experimental.js b/extensions/renderer/resources/guest_view/web_view/web_view_experimental.js
deleted file mode 100644
index 96331df..0000000
--- a/extensions/renderer/resources/guest_view/web_view/web_view_experimental.js
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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.
-
-// This module implements experimental API for <webview>.
-// See web_view.js and web_view_api_methods.js for details.
-//
-// <webview> Experimental API is only available on canary and channels of
-// Chrome.
-
-var WebViewImpl = require('webView').WebViewImpl;
-var WebViewInternal = require('webViewInternal').WebViewInternal;
-
-// An array of <webview>'s experimental API methods.  See |WEB_VIEW_API_METHODS|
-// in web_view_api_methods.js for more details.
-var WEB_VIEW_EXPERIMENTAL_API_METHODS = [
-  // Captures the visible region of the WebView contents into a bitmap.
-  'captureVisibleRegion'
-];
-
-// Registers the experimantal WebVIew API when available.
-WebViewImpl.maybeGetExperimentalApiMethods = function() {
-  return WEB_VIEW_EXPERIMENTAL_API_METHODS;
-};