Make <webview> use out-of-process iframe architecture.

content/browser/frame_host/render_widget_host_view_child_frame.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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
@@ skipping 105 matching lines @@
   NOTREACHED();
 }
 
 void RenderWidgetHostViewChildFrame::ImeCancelComposition() {
   NOTREACHED();
 }
 
 void RenderWidgetHostViewChildFrame::ImeCompositionRangeChanged(
     const gfx::Range& range,
     const std::vector<gfx::Rect>& character_bounds) {
-  NOTREACHED();
+//  NOTREACHED();

[Charlie Reis, 2015/04/30 23:06:46]

What do we need to do to resolve this?

 }
 
 void RenderWidgetHostViewChildFrame::MovePluginWindows(
     const std::vector<WebPluginGeometry>& moves) {
 }
 
 void RenderWidgetHostViewChildFrame::Blur() {
 }
 
 void RenderWidgetHostViewChildFrame::UpdateCursor(const WebCursor& cursor) {
 }
 
 void RenderWidgetHostViewChildFrame::SetIsLoading(bool is_loading) {
-  NOTREACHED();
+//  NOTREACHED();
 }
 
 void RenderWidgetHostViewChildFrame::TextInputTypeChanged(
     ui::TextInputType type,
     ui::TextInputMode input_mode,
     bool can_compose_inline,
     int flags) {
   // TODO(kenrb): Implement.
 }
 
@@ skipping 152 matching lines @@
 }
 
 BrowserAccessibilityManager*
 RenderWidgetHostViewChildFrame::CreateBrowserAccessibilityManager(
     BrowserAccessibilityDelegate* delegate) {
   return BrowserAccessibilityManager::Create(
       BrowserAccessibilityManager::GetEmptyDocument(), delegate);
 }
 
 }  // namespace content