Move cache clearing from AwRenderViewExt to AwRenderFrameExt.

android_webview/renderer/aw_render_frame_ext.cc

 // Copyright 2014 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 "android_webview/common/aw_hit_test_data.h"
 #include "android_webview/common/render_view_messages.h"
 #include "android_webview/renderer/aw_render_frame_ext.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/renderer/android_content_detection_prefixes.h"
 #include "content/public/renderer/document_state.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebElementCollection.h"
 #include "third_party/WebKit/public/web/WebFrameWidget.h"
 #include "third_party/WebKit/public/web/WebHitTestResult.h"
+#include "third_party/WebKit/public/web/WebImageCache.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebMeaningfulLayout.h"
 #include "third_party/WebKit/public/web/WebNode.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "url/url_canon.h"
 #include "url/url_constants.h"
 #include "url/url_util.h"
 
 namespace android_webview {
 
@@ skipping 109 matching lines @@
 
 void AwRenderFrameExt::DidCommitProvisionalLoad(bool is_new_navigation,
                                                 bool is_same_page_navigation) {
   blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
   content::DocumentState* document_state =
       content::DocumentState::FromDataSource(frame->dataSource());
   if (document_state->can_load_local_resources()) {
     blink::WebSecurityOrigin origin = frame->document().getSecurityOrigin();
     origin.grantLoadLocalResources();
   }
+
+  // Clear the cache when we cross site boundaries in the main frame.

[boliu, 2016/03/10 21:59:58]

Can add what we found in the email thread as a comment for the next person? ie
goal here is to clear cache when multi-process chrome would have moved to a new
renderer process.

[Avi (use Gerrit), 2016/03/10 22:07:56]

Done.

+  if (!frame->parent()) {
+    url::Origin new_origin(frame->document().url());
+    if (!new_origin.IsSameOriginWith(last_origin_)) {
+      last_origin_ = new_origin;
+      blink::WebImageCache::clear();
+    }
+  }
 }
 
 bool AwRenderFrameExt::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AwRenderFrameExt, message)
     IPC_MESSAGE_HANDLER(AwViewMsg_DocumentHasImages, OnDocumentHasImagesRequest)
     IPC_MESSAGE_HANDLER(AwViewMsg_DoHitTest, OnDoHitTest)
     IPC_MESSAGE_HANDLER(AwViewMsg_SetTextZoomFactor, OnSetTextZoomFactor)
     IPC_MESSAGE_HANDLER(AwViewMsg_ResetScrollAndScaleState,
                         OnResetScrollAndScaleState)
@@ skipping 121 matching lines @@
 }
 
 blink::WebFrameWidget* AwRenderFrameExt::GetWebFrameWidget() {
   if (!render_frame() || !render_frame()->GetRenderView())
     return nullptr;
 
   return render_frame()->GetRenderView()->GetWebFrameWidget();
 }
 
 }  // namespace android_webview