cc: Introduce BeginFrame sequence numbers and acknowledgements.

content/browser/renderer_host/render_widget_host_view_android.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <queue>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "cc/input/selection.h"
 #include "cc/output/begin_frame_args.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/android/content_view_core_impl_observer.h"
 #include "content/browser/renderer_host/delegated_frame_evictor.h"
 #include "content/browser/renderer_host/ime_adapter_android.h"
 #include "content/browser/renderer_host/input/stylus_text_selector.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/text_input_manager.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/readback_types.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/android/delegated_frame_host_android.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android_observer.h"
 #include "ui/events/android/motion_event_android.h"
 #include "ui/events/gesture_detection/filtered_gesture_provider.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 #include "ui/gfx/selection_bound.h"
 #include "ui/touch_selection/touch_selection_controller.h"
 
 class GURL;
 
 namespace ui {
 struct DidOverscrollParams;
 }
 
-namespace ui {
-class DelegatedFrameHostAndroid;
-}
-
 namespace content {
 class ContentViewCoreImpl;
 class OverscrollControllerAndroid;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class SynchronousCompositorHost;
 class SynchronousCompositorClient;
 struct NativeWebKeyboardEvent;
 
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
 // -----------------------------------------------------------------------------
 class CONTENT_EXPORT RenderWidgetHostViewAndroid
     : public RenderWidgetHostViewBase,
       public ui::GestureProviderClient,
       public ui::WindowAndroidObserver,
       public DelegatedFrameEvictorClient,
       public StylusTextSelectorClient,
       public ui::TouchSelectionControllerClient,
       public content::ContentViewCoreImplObserver,
-      public content::TextInputManager::Observer {
+      public content::TextInputManager::Observer,
+      public ui::DelegatedFrameHostAndroid::Client,
+      public cc::BeginFrameObserver {
  public:
   RenderWidgetHostViewAndroid(RenderWidgetHostImpl* widget,
                               ContentViewCoreImpl* content_view_core);
   ~RenderWidgetHostViewAndroid() override;
 
   void Blur();
 
   // RenderWidgetHostView implementation.
   bool OnMessageReceived(const IPC::Message& msg) override;
   void InitAsChild(gfx::NativeView parent_view) override;
@@ skipping 52 matching lines @@
       const blink::WebInputEvent& input_event) override;
   void OnSetNeedsFlushInput() override;
   void GestureEventAck(const blink::WebGestureEvent& event,
                        InputEventAckState ack_result) override;
   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate, bool for_root_frame) override;
   bool LockMouse() override;
   void UnlockMouse() override;
   void OnSwapCompositorFrame(uint32_t compositor_frame_sink_id,
                              cc::CompositorFrame frame) override;
+  void OnBeginFrameDidNotDraw(cc::BeginFrameAck ack) override;
   void ClearCompositorFrame() override;
   void DidOverscroll(const ui::DidOverscrollParams& params) override;
   void DidStopFlinging() override;
   cc::FrameSinkId GetFrameSinkId() override;
   void ShowDisambiguationPopup(const gfx::Rect& rect_pixels,
                                const SkBitmap& zoomed_bitmap) override;
   std::unique_ptr<SyntheticGestureTarget> CreateSyntheticGestureTarget()
       override;
   void LockCompositingSurface() override;
   void UnlockCompositingSurface() override;
   void OnDidNavigateMainFrameToNewPage() override;
   void SetNeedsBeginFrames(bool needs_begin_frames) override;
 
   // ui::GestureProviderClient implementation.
   void OnGestureEvent(const ui::GestureEventData& gesture) override;
 
   // ui::WindowAndroidObserver implementation.
   void OnCompositingDidCommit() override;
   void OnRootWindowVisibilityChanged(bool visible) override;
   void OnAttachCompositor() override;
   void OnDetachCompositor() override;
-  void OnVSync(base::TimeTicks frame_time,
-               base::TimeDelta vsync_period) override;
   void OnAnimate(base::TimeTicks begin_frame_time) override;
   void OnActivityStopped() override;
   void OnActivityStarted() override;
 
   // content::ContentViewCoreImplObserver implementation.
   void OnContentViewCoreDestroyed() override;
   void OnAttachedToWindow() override;
   void OnDetachedFromWindow() override;
 
   // DelegatedFrameEvictor implementation
   void EvictDelegatedFrame() override;
 
   // StylusTextSelectorClient implementation.
   void OnStylusSelectBegin(float x0, float y0, float x1, float y1) override;
   void OnStylusSelectUpdate(float x, float y) override;
   void OnStylusSelectEnd() override;
   void OnStylusSelectTap(base::TimeTicks time, float x, float y) override;
 
   // ui::TouchSelectionControllerClient implementation.
   bool SupportsAnimation() const override;
   void SetNeedsAnimate() override;
   void MoveCaret(const gfx::PointF& position) override;
   void MoveRangeSelectionExtent(const gfx::PointF& extent) override;
   void SelectBetweenCoordinates(const gfx::PointF& base,
                                 const gfx::PointF& extent) override;
   void OnSelectionEvent(ui::SelectionEventType event) override;
   std::unique_ptr<ui::TouchHandleDrawable> CreateDrawable() override;
 
+  // DelegatedFrameHostAndroid::Client implementation.
+  void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
+  void ReturnResources(const cc::ReturnedResourceArray& resources) override;
+
+  // cc::BeginFrameObserver implementation.
+  void OnBeginFrame(const cc::BeginFrameArgs& args) override;
+  const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override;
+  void OnBeginFrameSourcePausedChanged(bool paused) override;
+
   // Non-virtual methods
   void SetContentViewCore(ContentViewCoreImpl* content_view_core);
   SkColor GetCachedBackgroundColor() const;
   void SendKeyEvent(const NativeWebKeyboardEvent& event);
   void SendMouseEvent(const ui::MotionEventAndroid&, int changed_button);
   void SendMouseWheelEvent(const blink::WebMouseWheelEvent& event);
   void SendGestureEvent(const blink::WebGestureEvent& event);
 
   void OnStartContentIntent(const GURL& content_url, bool is_main_frame);
   void OnSmartClipDataExtracted(const base::string16& text,
@@ skipping 69 matching lines @@
   // Drop any incoming frames from the renderer when there are locks on the
   // current frame.
   void RetainFrame(uint32_t compositor_frame_sink_id,
                    cc::CompositorFrame frame);
 
   void InternalSwapCompositorFrame(uint32_t compositor_frame_sink_id,
                                    cc::CompositorFrame frame);
   void DestroyDelegatedContent();
   void OnLostResources();
 
-  void ReturnResources(const cc::ReturnedResourceArray& resources);
-
-  enum VSyncRequestType {
+  enum BeginFrameRequestType {
     FLUSH_INPUT = 1 << 0,
     BEGIN_FRAME = 1 << 1,
     PERSISTENT_BEGIN_FRAME = 1 << 2
   };
-  void RequestVSyncUpdate(uint32_t requests);
+  void AddBeginFrameRequest(BeginFrameRequestType request);
+  void ClearBeginFrameRequest(BeginFrameRequestType request);
   void StartObservingRootWindow();
   void StopObservingRootWindow();
-  void SendBeginFrame(base::TimeTicks frame_time, base::TimeDelta vsync_period);
+  void SendBeginFrame(cc::BeginFrameArgs args);
   bool Animate(base::TimeTicks frame_time);
   void RequestDisallowInterceptTouchEvent();
 
   bool SyncCompositorOnMessageReceived(const IPC::Message& message);
 
   void ComputeEventLatencyOSTouchHistograms(const ui::MotionEvent& event);
 
   // The model object.
   RenderWidgetHostImpl* host_;
 
-  // Used to control action dispatch at the next |OnVSync()| call.
-  uint32_t outstanding_vsync_requests_;
+  // The begin frame source being observed.  Null if none.
+  cc::BeginFrameSource* begin_frame_source_;
+  cc::BeginFrameArgs last_begin_frame_args_;
+
+  // Indicates whether and for what reason a request for begin frames has been
+  // issued. Used to control action dispatch at the next |OnBeginFrame()| call.
+  uint32_t outstanding_begin_frame_requests_;
 
   bool is_showing_;
 
   // Window-specific bits that affect widget visibility.
   bool is_window_visible_;
   bool is_window_activity_started_;
 
   // ContentViewCoreImpl is our interface to the view system.
   ContentViewCoreImpl* content_view_core_;
 
@@ skipping 58 matching lines @@
   gfx::Vector2dF last_scroll_offset_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_