cc: Adding support for RGBA_4444 tile textures

cc/resources/prioritized_resource.cc

Index: cc/resources/prioritized_resource.cc
diff --git a/cc/resources/prioritized_resource.cc b/cc/resources/prioritized_resource.cc
index 78fd90055a9a6e05077a7b752a4ca8c8f35f4404..6ec5eb4f4fd2ebdf0d46b15dce479e1fbfe76bd0 100644
--- a/cc/resources/prioritized_resource.cc
+++ b/cc/resources/prioritized_resource.cc
@@ -27,8 +27,10 @@ PrioritizedResource::PrioritizedResource(PrioritizedResourceManager* manager,
       manager_(NULL) {
   // manager_ is set in RegisterTexture() so validity can be checked.
   DCHECK(format || size.IsEmpty());
-  if (format)
-    bytes_ = Resource::MemorySizeBytes(size, format);
+  if (format) {
+    bytes_ = Resource::MemorySizeBytes(
+        size, format, ResourceProvider::RGBA_8888);
+  }
   if (manager)
     manager->RegisterTexture(this);
 }
@@ -53,7 +55,8 @@ void PrioritizedResource::SetDimensions(gfx::Size size, GLenum format) {
     is_above_priority_cutoff_ = false;
     format_ = format;
     size_ = size;
-    bytes_ = Resource::MemorySizeBytes(size, format);
+    bytes_ = Resource::MemorySizeBytes(
+        size, format, ResourceProvider::RGBA_8888);
     DCHECK(manager_ || !backing_);
     if (manager_)
       manager_->ReturnBackingTexture(this);
@@ -122,7 +125,7 @@ PrioritizedResource::Backing::Backing(unsigned id,
                                       ResourceProvider* resource_provider,
                                       gfx::Size size,
                                       GLenum format)
-    : Resource(id, size, format),
+    : Resource(id, size, format, ResourceProvider::RGBA_8888),
       owner_(NULL),
       priority_at_last_priority_update_(PriorityCalculator::LowestPriority()),
       was_above_priority_cutoff_at_last_priority_update_(false),