android: Use hw acceleration in android_webview_shell

content/browser/android/in_process/synchronous_compositor_output_surface.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/android/in_process/synchronous_compositor_output_surface.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 188 matching lines @@
     const gfx::Transform& transform,
     gfx::Rect viewport,
     gfx::Rect clip,
     bool hardware_draw) {
   DCHECK(!invoking_composite_);
   DCHECK(!frame_holder_.get());
   base::AutoReset<bool> invoking_composite_resetter(&invoking_composite_, true);
 
   gfx::Transform adjusted_transform = transform;
   AdjustTransform(&adjusted_transform, viewport);
+  LOG(INFO) << "external draw constr " <<
+            transform.ToString() << " viewport " << viewport.ToString() <<
+            "clip " << clip.ToString();
   SetExternalDrawConstraints(
       adjusted_transform, viewport, clip, !hardware_draw);
   SetNeedsRedrawRect(gfx::Rect(viewport.size()));
   client_->BeginFrame(cc::BeginFrameArgs::CreateForSynchronousCompositor());
 
   // After software draws (which might move the viewport arbitrarily), restore
   // the previous hardware viewport to allow CC's tile manager to prioritize
   // properly.
   if (hardware_draw) {
     cached_hw_transform_ = adjusted_transform;
@@ skipping 36 matching lines @@
 bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
 SynchronousCompositorOutputSurfaceDelegate*
 SynchronousCompositorOutputSurface::GetDelegate() {
   return SynchronousCompositorImpl::FromRoutingID(routing_id_);
 }
 
 }  // namespace content