cc: Adding support for RGBA_4444 tile textures

cc/resources/resource.h

Index: cc/resources/resource.h
diff --git a/cc/resources/resource.h b/cc/resources/resource.h
index 1c658223649375835534122493f4e399a51f6e95..aa4219e7c0e0e884fb831940bce622bddee01d99 100644
--- a/cc/resources/resource.h
+++ b/cc/resources/resource.h
@@ -15,10 +15,11 @@ namespace cc {
 class CC_EXPORT Resource {
  public:
   Resource() : id_(0) {}
-  Resource(unsigned id, gfx::Size size, GLenum format)
+  Resource(unsigned id, gfx::Size size, GLenum format, bool is_16_bit_resource)
       : id_(id),
         size_(size),
-        format_(format) {}
+        format_(format),
+        is_16_bit_resource_(is_16_bit_resource) {}
 
   ResourceProvider::ResourceId id() const { return id_; }
   gfx::Size size() const { return size_; }
@@ -26,8 +27,9 @@ class CC_EXPORT Resource {
 
   size_t bytes() const;
 
-  static size_t BytesPerPixel(GLenum format);
-  static size_t MemorySizeBytes(gfx::Size size, GLenum format);
+  static size_t BytesPerPixel(GLenum format, bool is_16_bit_resource);
+  static size_t MemorySizeBytes(
+      gfx::Size size, GLenum format, bool is_16_bit_resource);
 
  protected:
   void set_id(ResourceProvider::ResourceId id) { id_ = id; }
@@ -40,6 +42,7 @@ class CC_EXPORT Resource {
   ResourceProvider::ResourceId id_;
   gfx::Size size_;
   GLenum format_;
+  bool is_16_bit_resource_;
 
   DISALLOW_COPY_AND_ASSIGN(Resource);
 };