Merge 92520 - [chromium] Accelerated canvas breaks when moving canvases or resources between Pages

Source/WebCore/page/Page.cpp

Index: Source/WebCore/page/Page.cpp
===================================================================
--- Source/WebCore/page/Page.cpp	(revision 93254)
+++ Source/WebCore/page/Page.cpp	(working copy)
@@ -75,10 +75,6 @@
 #include <wtf/StdLibExtras.h>
 #include <wtf/text/StringHash.h>
 
-#if ENABLE(ACCELERATED_2D_CANVAS)
-#include "GraphicsContext3D.h"
-#endif
-
 #if ENABLE(DOM_STORAGE)
 #include "StorageArea.h"
 #include "StorageNamespace.h"
@@ -752,23 +748,6 @@
         frame->script()->attachDebugger(m_debugger);
 }
 
-GraphicsContext3D* Page::sharedGraphicsContext3D()
-{
-#if ENABLE(ACCELERATED_2D_CANVAS)
-    if (!m_sharedGraphicsContext3D) {
-        GraphicsContext3D::Attributes attr;
-        attr.depth = false;
-        attr.stencil = true;
-        attr.antialias = false;
-        attr.canRecoverFromContextLoss = false; // Canvas contexts can not handle lost contexts.
-        m_sharedGraphicsContext3D = GraphicsContext3D::create(attr, chrome());
-    }
-    return m_sharedGraphicsContext3D.get();
-#else // !ENABLE(ACCELERATED_2D_CANVAS)
-    return 0;
-#endif
-}
-
 #if ENABLE(DOM_STORAGE)
 StorageNamespace* Page::sessionStorage(bool optionalCreate)
 {