[WebView] Add a new flushVisualState API to AwContents.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 161 matching lines @@
   if (IsRFHStateActive(rfh_state_))
     GetSiteInstance()->decrement_active_frame_count();
 
   // Notify the FrameTree that this RFH is going away, allowing it to shut down
   // the corresponding RenderViewHost if it is no longer needed.
   frame_tree_->UnregisterRenderFrameHost(this);
 
   // NULL out the swapout timer; in crash dumps this member will be null only if
   // the dtor has run.
   swapout_event_monitor_timeout_.reset();
+
+  for(const auto& iter: flush_visual_state_callbacks_) {
+    iter.second.Run(false);
+  }
 }
 
 int RenderFrameHostImpl::GetRoutingID() {
   return routing_id_;
 }
 
 SiteInstanceImpl* RenderFrameHostImpl::GetSiteInstance() {
   return render_view_host_->GetSiteInstance();
 }
 
@@ skipping 117 matching lines @@
                                 OnDidCommitProvisionalLoad(msg))
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidDropNavigation, OnDidDropNavigation)
     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DocumentOnLoadCompleted,
                         OnDocumentOnLoadCompleted)
     IPC_MESSAGE_HANDLER(FrameHostMsg_BeforeUnload_ACK, OnBeforeUnloadACK)
     IPC_MESSAGE_HANDLER(FrameHostMsg_SwapOut_ACK, OnSwapOutACK)
     IPC_MESSAGE_HANDLER(FrameHostMsg_ContextMenu, OnContextMenu)
     IPC_MESSAGE_HANDLER(FrameHostMsg_JavaScriptExecuteResponse,
                         OnJavaScriptExecuteResponse)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_FlushVisualStateResponse,
+                        OnFlushVisualStateResponse)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_RunJavaScriptMessage,
                                     OnRunJavaScriptMessage)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_RunBeforeUnloadConfirm,
                                     OnRunBeforeUnloadConfirm)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidAccessInitialDocument,
                         OnDidAccessInitialDocument)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidDisownOpener, OnDidDisownOpener)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidAssignPageId, OnDidAssignPageId)
     IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateTitle, OnUpdateTitle)
     IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateEncoding, OnUpdateEncoding)
@@ skipping 597 matching lines @@
   std::map<int, JavaScriptResultCallback>::iterator it =
       javascript_callbacks_.find(id);
   if (it != javascript_callbacks_.end()) {
     it->second.Run(result_value);
     javascript_callbacks_.erase(it);
   } else {
     NOTREACHED() << "Received script response for unknown request";
   }
 }
 
+void RenderFrameHostImpl::OnFlushVisualStateResponse(int id) {
+  auto it = flush_visual_state_callbacks_.find(id);
+  if (it != flush_visual_state_callbacks_.end()) {
+    it->second.Run(true);
+    flush_visual_state_callbacks_.erase(it);
+  } else {
+    NOTREACHED() << "Received script response for unknown request";
+  }
+}
+
 void RenderFrameHostImpl::OnRunJavaScriptMessage(
     const base::string16& message,
     const base::string16& default_prompt,
     const GURL& frame_url,
     JavaScriptMessageType type,
     IPC::Message* reply_msg) {
   // While a JS message dialog is showing, tabs in the same process shouldn't
   // process input events.
   GetProcess()->SetIgnoreInputEvents(true);
   render_view_host_->StopHangMonitorTimeout();
@@ skipping 563 matching lines @@
     int request_id) {
   AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
   if (accessibility_mode & AccessibilityModeFlagPlatform) {
     BrowserAccessibilityManager* manager =
         GetOrCreateBrowserAccessibilityManager();
     if (manager)
       manager->ActivateFindInPageResult(request_id);
   }
 }
 
+void RenderFrameHostImpl::FlushVisualState(
+    const FlushVisualStateResultCallback& callback) {
+  static int next_id = 1;
+  int key = next_id++;
+  Send(new FrameMsg_FlushVisualStateRequest(routing_id_, key));
+  flush_visual_state_callbacks_.insert(std::make_pair(key, callback));
+}
+
 #if defined(OS_WIN)
 
 void RenderFrameHostImpl::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
   RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
       render_view_host_->GetView());
   if (view)
     view->SetParentNativeViewAccessible(accessible_parent);
 }
 
@@ skipping 79 matching lines @@
 void RenderFrameHostImpl::DidUseGeolocationPermission() {
   RenderFrameHost* top_frame = frame_tree_node()->frame_tree()->GetMainFrame();
   GetContentClient()->browser()->RegisterPermissionUsage(
       PERMISSION_GEOLOCATION,
       delegate_->GetAsWebContents(),
       GetLastCommittedURL().GetOrigin(),
       top_frame->GetLastCommittedURL().GetOrigin());
 }
 
 }  // namespace content