A speculative Revert for r165872 - Remove static thread pointers from CC, attempt 2

cc/gl_renderer_unittest.cc

Index: cc/gl_renderer_unittest.cc
===================================================================
--- cc/gl_renderer_unittest.cc	(revision 165906)
+++ cc/gl_renderer_unittest.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "cc/prioritized_texture_manager.h"
 #include "cc/resource_provider.h"
 #include "cc/settings.h"
+#include "cc/single_thread_proxy.h"
 #include "cc/test/fake_web_compositor_output_surface.h"
 #include "cc/test/fake_web_graphics_context_3d.h"
 #include "cc/test/test_common.h"
@@ -41,6 +42,9 @@
     int frameCount() { return m_frame; }
     void setMemoryAllocation(WebGraphicsMemoryAllocation allocation)
     {
+        DCHECK(Proxy::isImplThread());
+        // In single threaded mode we expect this callback on main thread.
+        DebugScopedSetMainThread main;
         m_memoryAllocationChangedCallback->onMemoryAllocationChanged(allocation);
     }
 
@@ -72,7 +76,6 @@
     virtual void setFullRootLayerDamage() OVERRIDE { m_setFullRootLayerDamageCount++; }
     virtual void setManagedMemoryPolicy(const ManagedMemoryPolicy& policy) OVERRIDE { m_memoryAllocationLimitBytes = policy.bytesLimitWhenVisible; }
     virtual void enforceManagedMemoryPolicy(const ManagedMemoryPolicy& policy) OVERRIDE { if (m_lastCallWasSetVisibility) *m_lastCallWasSetVisibility = false; }
-    virtual bool hasImplThread() const OVERRIDE { return false; }
 
     // Methods added for test.
     int setFullRootLayerDamageCount() const { return m_setFullRootLayerDamageCount; }
@@ -87,6 +90,7 @@
 private:
     int m_setFullRootLayerDamageCount;
     bool* m_lastCallWasSetVisibility;
+    DebugScopedSetImplThread m_implThread;
     scoped_ptr<LayerImpl> m_rootLayer;
     RenderPassList m_renderPassesInDrawOrder;
     RenderPassIdHashMap m_renderPasses;