Remove no-op did(De)activateCompositor calls

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index d5d58bfc4e7c71b3c1172802bd7e7c4310123fa1..d60b1b8a9c1ed0e7bda7f7c8c3097e88902e522f 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -3854,7 +3854,6 @@ void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
 
     if (!active) {
         m_isAcceleratedCompositingActive = false;
-        m_client->didDeactivateCompositor();
         if (!m_layerTreeViewCommitsDeferred
             && blink::Platform::current()->isThreadedCompositingEnabled()) {
             ASSERT(m_layerTreeView);
@@ -3869,8 +3868,6 @@ void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
         updateLayerTreeViewport();
         if (m_pageOverlays)
             m_pageOverlays->update();
-
-        m_client->didActivateCompositor();
     } else {
         TRACE_EVENT0("webkit", "WebViewImpl::setIsAcceleratedCompositingActive(true)");
 
@@ -3891,7 +3888,6 @@ void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
                 m_layerTreeView->setOverhangBitmap(overhangImage->nativeImageForCurrentFrame()->bitmap());
 #endif
             updateLayerTreeViewport();
-            m_client->didActivateCompositor();
             m_isAcceleratedCompositingActive = true;
             if (m_pageOverlays)
                 m_pageOverlays->update();
@@ -3908,7 +3904,6 @@ void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
             // 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();
         }