Revert of Revert of [Android] Use UIResource for overscroll glow

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 "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 174 matching lines @@
     : host_(widget_host),
       needs_begin_frame_(false),
       is_showing_(!widget_host->is_hidden()),
       content_view_core_(NULL),
       ime_adapter_android_(this),
       cached_background_color_(SK_ColorWHITE),
       last_output_surface_id_(kUndefinedOutputSurfaceId),
       weak_ptr_factory_(this),
       overscroll_effect_enabled_(!CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableOverscrollEdgeEffect)),
-      overscroll_effect_(OverscrollGlow::Create(overscroll_effect_enabled_)),
       gesture_provider_(CreateGestureProviderConfig(), this),
       gesture_text_selector_(this),
       touch_scrolling_(false),
       potentially_active_fling_count_(0),
       flush_input_requested_(false),
       accelerated_surface_route_id_(0),
       using_synchronous_compositor_(SynchronousCompositorImpl::FromID(
                                         widget_host->GetProcess()->GetID(),
                                         widget_host->GetRoutingID()) != NULL),
       frame_evictor_(new DelegatedFrameEvictor(this)),
@@ skipping 155 matching lines @@
 void RenderWidgetHostViewAndroid::MovePluginWindows(
     const std::vector<WebPluginGeometry>& moves) {
   // We don't have plugin windows on Android. Do nothing. Note: this is called
   // from RenderWidgetHost::OnUpdateRect which is itself invoked while
   // processing the corresponding message from Renderer.
 }
 
 void RenderWidgetHostViewAndroid::Focus() {
   host_->Focus();
   host_->SetInputMethodActive(true);
-  if (overscroll_effect_enabled_)
+  if (overscroll_effect_)
     overscroll_effect_->Enable();
 }
 
 void RenderWidgetHostViewAndroid::Blur() {
   host_->ExecuteEditCommand("Unselect", "");
   host_->SetInputMethodActive(false);
   host_->Blur();
-  overscroll_effect_->Disable();
+  if (overscroll_effect_)
+    overscroll_effect_->Disable();
 }
 
 bool RenderWidgetHostViewAndroid::HasFocus() const {
   if (!content_view_core_)
     return false;  // ContentViewCore not created yet.
 
   return content_view_core_->HasFocus();
 }
 
 bool RenderWidgetHostViewAndroid::IsSurfaceAvailableForCopy() const {
@@ skipping 532 matching lines @@
   // Calculate the content size.  This should be 0 if the texture_size is 0.
   gfx::Vector2dF offset;
   if (texture_size_in_layer_.GetArea() > 0)
     offset = frame_metadata.location_bar_content_translation;
   offset.set_y(offset.y() + frame_metadata.overdraw_bottom_height);
   offset.Scale(frame_metadata.device_scale_factor);
   content_size_in_layer_ =
       gfx::Size(texture_size_in_layer_.width() - offset.x(),
                 texture_size_in_layer_.height() - offset.y());
 
-  overscroll_effect_->UpdateDisplayParameters(
-      CreateOverscrollDisplayParameters(frame_metadata));
+  if (overscroll_effect_) {
+    overscroll_effect_->UpdateDisplayParameters(
+        CreateOverscrollDisplayParameters(frame_metadata));
+  }
 }
 
 void RenderWidgetHostViewAndroid::InternalSwapCompositorFrame(
     uint32 output_surface_id,
     scoped_ptr<cc::CompositorFrame> frame) {
   if (!frame->delegated_frame_data) {
     LOG(ERROR) << "Non-delegated renderer path no longer supported";
     return;
   }
 
@@ skipping 192 matching lines @@
   NOTREACHED() << "Need --composite-to-mailbox or --enable-delegated-renderer";
 }
 
 void RenderWidgetHostViewAndroid::AttachLayers() {
   if (!content_view_core_)
     return;
   if (!layer_.get())
     return;
 
   content_view_core_->AttachLayer(layer_);
-  if (overscroll_effect_enabled_)
+  if (overscroll_effect_)
     overscroll_effect_->Enable();
   layer_->SetHideLayerAndSubtree(!is_showing_);
 }
 
 void RenderWidgetHostViewAndroid::RemoveLayers() {
   if (!content_view_core_)
     return;
 
   if (!layer_.get())
     return;
 
   content_view_core_->RemoveLayer(layer_);
-  overscroll_effect_->Disable();
+  if (overscroll_effect_)
+    overscroll_effect_->Disable();
 }
 
 bool RenderWidgetHostViewAndroid::Animate(base::TimeTicks frame_time) {
-  bool needs_animate = overscroll_effect_->Animate(frame_time);
+  bool needs_animate =
+      overscroll_effect_ ? overscroll_effect_->Animate(frame_time) : false;
   if (selection_controller_)
     needs_animate |= selection_controller_->Animate(frame_time);
   return needs_animate;
 }
 
 void RenderWidgetHostViewAndroid::OnContentScrollingChange() {
   if (selection_controller_)
     selection_controller_->SetTemporarilyHidden(IsContentScrolling());
 }
 
@@ skipping 180 matching lines @@
 
 void RenderWidgetHostViewAndroid::SendMouseWheelEvent(
     const blink::WebMouseWheelEvent& event) {
   if (host_)
     host_->ForwardWheelEvent(event);
 }
 
 void RenderWidgetHostViewAndroid::SendGestureEvent(
     const blink::WebGestureEvent& event) {
   // Sending a gesture that may trigger overscroll should resume the effect.
-  if (overscroll_effect_enabled_)
-   overscroll_effect_->Enable();
+  if (overscroll_effect_)
+    overscroll_effect_->Enable();
 
   if (host_)
     host_->ForwardGestureEventWithLatencyInfo(event, CreateLatencyInfo(event));
 }
 
 void RenderWidgetHostViewAndroid::MoveCaret(const gfx::Point& point) {
   if (host_)
     host_->MoveCaret(point);
 }
 
 void RenderWidgetHostViewAndroid::HideTextHandles() {
   if (selection_controller_)
     selection_controller_->HideAndDisallowShowingAutomatically();
 }
 
 SkColor RenderWidgetHostViewAndroid::GetCachedBackgroundColor() const {
   return cached_background_color_;
 }
 
 void RenderWidgetHostViewAndroid::DidOverscroll(
     const DidOverscrollParams& params) {
   if (!content_view_core_ || !layer_ || !is_showing_)
     return;
 
   const float device_scale_factor = content_view_core_->GetDpiScale();
-  if (overscroll_effect_->OnOverscrolled(
+
+  if (overscroll_effect_ &&
+      overscroll_effect_->OnOverscrolled(
           content_view_core_->GetLayer(),
           base::TimeTicks::Now(),
           gfx::ScaleVector2d(params.accumulated_overscroll,
                              device_scale_factor),
           gfx::ScaleVector2d(params.latest_overscroll_delta,
                              device_scale_factor),
           gfx::ScaleVector2d(params.current_fling_velocity,
                              device_scale_factor))) {
     SetNeedsAnimate();
   }
@@ skipping 46 matching lines @@
     observing_root_window_ = true;
     if (needs_begin_frame_)
       content_view_core_->GetWindowAndroid()->RequestVSyncUpdate();
   }
 
   if (resize)
     WasResized();
 
   if (!selection_controller_)
     selection_controller_.reset(new TouchSelectionController(this));
+
+  if (!content_view_core_) {
+    overscroll_effect_.reset();
+  } else if (overscroll_effect_enabled_ && !overscroll_effect_) {
+    DCHECK(content_view_core_->GetWindowAndroid()->GetCompositor());
+    overscroll_effect_ =
+        OverscrollGlow::Create(&content_view_core_->GetWindowAndroid()
+                                    ->GetCompositor()
+                                    ->GetSystemUIResourceManager());
+  }
 }
 
 void RenderWidgetHostViewAndroid::RunAckCallbacks() {
   while (!ack_callbacks_.empty()) {
     ack_callbacks_.front().Run();
     ack_callbacks_.pop();
   }
 }
 
 void RenderWidgetHostViewAndroid::OnGestureEvent(
@@ skipping 187 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content