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

cc/resources/platform_color.h

Index: cc/resources/platform_color.h
diff --git a/cc/resources/platform_color.h b/cc/resources/platform_color.h
index 7e498635b2b8a73a020947753ad7752c0a4a4e8b..17eddc1faa7552fde72ce800d2d636bc524e86e2 100644
--- a/cc/resources/platform_color.h
+++ b/cc/resources/platform_color.h
@@ -24,19 +24,7 @@
   }
 
   // Returns the most efficient texture format for this platform.
-  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) {
+  static ResourceFormat BestTextureFormat(bool supports_bgra8888) {
     switch (Format()) {
       case SOURCE_FORMAT_BGRA8:
         return (supports_bgra8888) ? BGRA_8888 : RGBA_8888;