Introduce ViewRoot to forward input/view events to native

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 2012 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/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 428 matching lines @@
     ContentViewCoreImpl* content_view_core)
     : host_(widget_host),
       outstanding_vsync_requests_(0),
       is_showing_(!widget_host->is_hidden()),
       is_window_visible_(true),
       is_window_activity_started_(true),
       is_showing_overscroll_glow_(true),
       content_view_core_(nullptr),
       ime_adapter_android_(this),
       cached_background_color_(SK_ColorWHITE),
+      view_(this),
       last_compositor_frame_sink_id_(kUndefinedCompositorFrameSinkId),
       gesture_provider_(ui::GetGestureProviderConfig(
                             ui::GestureProviderConfigType::CURRENT_PLATFORM),
                         this),
       stylus_text_selector_(this),
       using_browser_compositor_(CompositorImpl::IsInitialized()),
       synchronous_compositor_client_(nullptr),
       frame_evictor_(new DelegatedFrameEvictor(this)),
       locks_on_frame_count_(0),
       observing_root_window_(false),
@@ skipping 256 matching lines @@
 gfx::Size RenderWidgetHostViewAndroid::GetPhysicalBackingSize() const {
   if (!content_view_core_) {
     if (default_bounds_.IsEmpty()) return gfx::Size();
 
     return gfx::Size(default_bounds_.right()
         * ui::GetScaleFactorForNativeView(GetNativeView()),
         default_bounds_.bottom()
         * ui::GetScaleFactorForNativeView(GetNativeView()));
   }
 
-  return content_view_core_->GetPhysicalBackingSize();
+  return view_.GetPhysicalBackingSize();
 }
 
 bool RenderWidgetHostViewAndroid::DoBrowserControlsShrinkBlinkSize() const {
   // Whether or not Blink's viewport size should be shrunk by the height of the
   // URL-bar.
   return content_view_core_ &&
          content_view_core_->DoBrowserControlsShrinkBlinkSize();
 }
 
 float RenderWidgetHostViewAndroid::GetTopControlsHeight() const {
@@ skipping 64 matching lines @@
 
 void RenderWidgetHostViewAndroid::SetNeedsBeginFrames(bool needs_begin_frames) {
   TRACE_EVENT1("cc", "RenderWidgetHostViewAndroid::SetNeedsBeginFrames",
                "needs_begin_frames", needs_begin_frames);
   if (needs_begin_frames)
     RequestVSyncUpdate(PERSISTENT_BEGIN_FRAME);
   else
     outstanding_vsync_requests_ &= ~PERSISTENT_BEGIN_FRAME;
 }
 
+void RenderWidgetHostViewAndroid::OnPhysicalBackingSizeChanged(int width,
+                                                               int height) {
+  WasResized();
+}
+
 void RenderWidgetHostViewAndroid::OnStartContentIntent(
     const GURL& content_url, bool is_main_frame) {
   if (content_view_core_)
     content_view_core_->StartContentIntent(content_url, is_main_frame);
 }
 
 void RenderWidgetHostViewAndroid::OnSmartClipDataExtracted(
     const base::string16& text,
     const base::string16& html,
     const gfx::Rect rect) {
@@ skipping 1175 matching lines @@
     case ui::MotionEvent::ACTION_UP:
     case ui::MotionEvent::ACTION_POINTER_UP:
       UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.OS.TOUCH_RELEASED",
                                   delta.InMicroseconds(), 1, 1000000, 50);
     default:
       return;
   }
 }
 
 }  // namespace content