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..b60673b65eb4b036c05a4628972bc56ea7271519 100644
--- a/cc/resources/prioritized_resource.cc
+++ b/cc/resources/prioritized_resource.cc
@@ -15,7 +15,7 @@ namespace cc {
 
 PrioritizedResource::PrioritizedResource(PrioritizedResourceManager* manager,
                                          gfx::Size size,
-                                         GLenum format)
+                                         ResourceProvider::TextureFormat format)
     : size_(size),
       format_(format),
       bytes_(0),
@@ -27,8 +27,9 @@ PrioritizedResource::PrioritizedResource(PrioritizedResourceManager* manager,
       manager_(NULL) {
   // manager_ is set in RegisterTexture() so validity can be checked.
   DCHECK(format || size.IsEmpty());
-  if (format)
+  if (format) {
     bytes_ = Resource::MemorySizeBytes(size, format);
+  }
   if (manager)
     manager->RegisterTexture(this);
 }
@@ -48,7 +49,8 @@ void PrioritizedResource::SetTextureManager(
     manager->RegisterTexture(this);
 }
 
-void PrioritizedResource::SetDimensions(gfx::Size size, GLenum format) {
+void PrioritizedResource::SetDimensions(
+    gfx::Size size, ResourceProvider::TextureFormat format) {
   if (format_ != format || size_ != size) {
     is_above_priority_cutoff_ = false;
     format_ = format;
@@ -113,7 +115,7 @@ void PrioritizedResource::Unlink() {
 }
 
 void PrioritizedResource::SetToSelfManagedMemoryPlaceholder(size_t bytes) {
-  SetDimensions(gfx::Size(), GL_RGBA);
+  SetDimensions(gfx::Size(), ResourceProvider::RGBA_8888);
   set_is_self_managed(true);
   bytes_ = bytes;
 }
@@ -121,7 +123,7 @@ void PrioritizedResource::SetToSelfManagedMemoryPlaceholder(size_t bytes) {
 PrioritizedResource::Backing::Backing(unsigned id,
                                       ResourceProvider* resource_provider,
                                       gfx::Size size,
-                                      GLenum format)
+                                      ResourceProvider::TextureFormat format)
     : Resource(id, size, format),
       owner_(NULL),
       priority_at_last_priority_update_(PriorityCalculator::LowestPriority()),