cc: Defer texture allocation (to allow async allocations).

cc/resource_provider.h

Index: cc/resource_provider.h
diff --git a/cc/resource_provider.h b/cc/resource_provider.h
index d90d2244340edfdc731913b8505f1dde6c5e4005..9b5b54b63475a413d3b65ca32d761f5cc6e856de 100644
--- a/cc/resource_provider.h
+++ b/cc/resource_provider.h
@@ -230,6 +230,10 @@ public:
     void beginSetPixels(ResourceId id);
     bool didSetPixelsComplete(ResourceId id);
 
+    // For tests only! This prevents detecting uninitialized reads.
+    // Use setPixels or lockForWrite to allocate implicitly.
+    void allocateForTesting(ResourceId id);
+
 private:
     struct Resource {
         Resource();
@@ -250,6 +254,7 @@ private:
         bool exported;
         bool markedForDeletion;
         bool pendingSetPixels;
+        bool allocated;
         gfx::Size size;
         GLenum format;
         // TODO(skyostil): Use a separate sampler object for filter state.
@@ -277,6 +282,7 @@ private:
 
     bool transferResource(WebKit::WebGraphicsContext3D*, ResourceId, TransferableResource*);
     void deleteResourceInternal(ResourceMap::iterator it);
+    void lazyAllocate(Resource*);
 
     OutputSurface* m_outputSurface;
     ResourceId m_nextId;