Remove no-op did(De)activateCompositor calls

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 3836 matching lines @@
     blink::Platform::current()->histogramEnumeration("GPU.setIsAcceleratedCompositingActive", active * 2 + m_isAcceleratedCompositingActive, 4);
 
     if (m_isAcceleratedCompositingActive == active)
         return;
 
     if (!m_client)
         return;
 
     if (!active) {
         m_isAcceleratedCompositingActive = false;
-        m_client->didDeactivateCompositor();
         if (!m_layerTreeViewCommitsDeferred
             && blink::Platform::current()->isThreadedCompositingEnabled()) {
             ASSERT(m_layerTreeView);
             // In threaded compositing mode, force compositing mode is always on so setIsAcceleratedCompositingActive(false)
             // means that we're transitioning to a new page. Suppress commits until WebKit generates invalidations so
             // we don't attempt to paint too early in the next page load.
             m_layerTreeView->setDeferCommits(true);
             m_layerTreeViewCommitsDeferred = true;
         }
     } else if (m_layerTreeView) {
         m_isAcceleratedCompositingActive = true;
         updateLayerTreeViewport();
         if (m_pageOverlays)
             m_pageOverlays->update();
-
-        m_client->didActivateCompositor();
     } else {
         TRACE_EVENT0("webkit", "WebViewImpl::setIsAcceleratedCompositingActive(true)");
 
         m_client->initializeLayerTreeView();
         m_layerTreeView = m_client->layerTreeView();
         if (m_layerTreeView) {
             m_layerTreeView->setRootLayer(*m_rootLayer);
 
             bool visible = page()->visibilityState() == PageVisibilityStateVisible;
             m_layerTreeView->setVisible(visible);
             updateLayerTreeDeviceScaleFactor();
             m_layerTreeView->setPageScaleFactorAndLimits(pageScaleFactor(), minimumPageScaleFactor(), maximumPageScaleFactor());
             updateLayerTreeBackgroundColor();
             m_layerTreeView->setHasTransparentBackground(isTransparent());
 #if USE(RUBBER_BANDING)
             RefPtr<Image> overhangImage = OverscrollTheme::theme()->getOverhangImage();
             if (overhangImage && overhangImage->nativeImageForCurrentFrame())
                 m_layerTreeView->setOverhangBitmap(overhangImage->nativeImageForCurrentFrame()->bitmap());
 #endif
             updateLayerTreeViewport();
-            m_client->didActivateCompositor();
             m_isAcceleratedCompositingActive = true;
             if (m_pageOverlays)
                 m_pageOverlays->update();
             m_layerTreeView->setShowFPSCounter(m_showFPSCounter);
             m_layerTreeView->setShowPaintRects(m_showPaintRects);
             m_layerTreeView->setShowDebugBorders(m_showDebugBorders);
             m_layerTreeView->setContinuousPaintingEnabled(m_continuousPaintingEnabled);
             m_layerTreeView->setShowScrollBottleneckRects(m_showScrollBottleneckRects);
             m_layerTreeView->heuristicsForGpuRasterizationUpdated(m_matchesHeuristicsForGpuRasterization);
         } else {
             // FIXME: It appears that only unittests, <webview> and android webview
             // printing can hit this code. We should make them not hit this code and
             // then delete this else clause and allowsBrokenNullLayerTreeView.
             // crbug.com/322276 and crbug.com/364716.
             ASSERT(m_client->allowsBrokenNullLayerTreeView());
             m_isAcceleratedCompositingActive = false;
-            m_client->didDeactivateCompositor();
             m_page->settings().setAcceleratedCompositingEnabled(false);
             m_page->updateAcceleratedCompositingSettings();
         }
     }
     if (page())
         page()->mainFrame()->view()->setClipsRepaints(!m_isAcceleratedCompositingActive);
 }
 
 void WebViewImpl::updateMainFrameScrollPosition(const IntPoint& scrollPosition, bool programmaticScroll)
 {
@@ skipping 184 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink