Allow one-copy task tile worker pool to use compressed textures.

cc/resources/platform_color.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_PLATFORM_COLOR_H_
 #define CC_RESOURCES_PLATFORM_COLOR_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "cc/resources/resource_format.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 namespace cc {
 
 class PlatformColor {
  public:
   enum SourceDataFormat {
     SOURCE_FORMAT_RGBA8,
     SOURCE_FORMAT_BGRA8
   };
 
   static SourceDataFormat Format() {
     return SK_B32_SHIFT ? SOURCE_FORMAT_RGBA8 : SOURCE_FORMAT_BGRA8;
   }
 
   // Returns the most efficient texture format for this platform.
-  static ResourceFormat BestTextureFormat(bool supports_bgra8888) {
+  static ResourceFormat BestTextureFormat() {
+    switch (Format()) {
+      case SOURCE_FORMAT_BGRA8:
+        return BGRA_8888;
+      case SOURCE_FORMAT_RGBA8:
+        return RGBA_8888;
+    }
+    NOTREACHED();
+    return RGBA_8888;
+  }
+
+  // Returns the most efficient supported texture format for this platform.
+  static ResourceFormat BestSupportedTextureFormat(bool supports_bgra8888) {
     switch (Format()) {
       case SOURCE_FORMAT_BGRA8:
         return (supports_bgra8888) ? BGRA_8888 : RGBA_8888;
       case SOURCE_FORMAT_RGBA8:
         return RGBA_8888;
     }
     NOTREACHED();
     return RGBA_8888;
   }
 
@@ skipping 10 matching lines @@
     return false;
   }
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformColor);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PLATFORM_COLOR_H_