Chromium compositor change implementing page-scale driven pinch-zoom.

cc/CCThreadProxy.cpp

 // Copyright 2011 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 "config.h"
 
 #include "CCThreadProxy.h"
 
 #include "CCDelayBasedTimeSource.h"
 #include "CCDrawQuad.h"
@@ skipping 442 matching lines @@
     setNeedsForcedCommitOnImplThread();
 }
 
 void CCThreadProxy::scheduledActionBeginFrame()
 {
     TRACE_EVENT0("cc", "CCThreadProxy::scheduledActionBeginFrame");
     ASSERT(!m_pendingBeginFrameRequest);
     m_pendingBeginFrameRequest = adoptPtr(new BeginFrameAndCommitState());
     m_pendingBeginFrameRequest->monotonicFrameBeginTime = monotonicallyIncreasingTime();
     m_pendingBeginFrameRequest->scrollInfo = m_layerTreeHostImpl->processScrollDeltas();
+    m_pendingBeginFrameRequest->implTransform = m_layerTreeHostImpl->implTransform();
     m_pendingBeginFrameRequest->memoryAllocationLimitBytes = m_layerTreeHostImpl->memoryAllocationLimitBytes();
     m_layerTreeHost->getEvictedContentTexturesBackings(m_pendingBeginFrameRequest->evictedContentsTexturesBackings);
 
     m_mainThreadProxy->postTask(createCCThreadTask(this, &CCThreadProxy::beginFrame));
 
     if (m_beginFrameCompletionEventOnImplThread) {
         m_beginFrameCompletionEventOnImplThread->signal();
         m_beginFrameCompletionEventOnImplThread = 0;
     }
 }
@@ skipping 24 matching lines @@
     m_commitRequestSentToImplThread = true;
 
     // On the other hand, the animationRequested flag needs to be cleared
     // here so that any animation requests generated by the apply or animate
     // callbacks will trigger another frame.
     m_animateRequested = false;
 
     // FIXME: technically, scroll deltas need to be applied for dropped commits as well.
     // Re-do the commit flow so that we don't send the scrollInfo on the BFAC message.
     m_layerTreeHost->applyScrollAndScale(*request->scrollInfo);
+    m_layerTreeHost->setImplTransform(request->implTransform);
 
     if (!m_inCompositeAndReadback && !m_layerTreeHost->visible()) {
         m_commitRequested = false;
         m_commitRequestSentToImplThread = false;
         m_forcedCommitRequested = false;
 
         TRACE_EVENT0("cc", "EarlyOut_NotVisible");
         CCProxy::implThread()->postTask(createCCThreadTask(this, &CCThreadProxy::beginFrameAbortedOnImplThread));
         return;
     }
@@ skipping 415 matching lines @@
 CCThreadProxy::BeginFrameAndCommitState::BeginFrameAndCommitState()
     : monotonicFrameBeginTime(0)
 {
 }
 
 CCThreadProxy::BeginFrameAndCommitState::~BeginFrameAndCommitState()
 {
 }
 
 } // namespace cc