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

cc/resources/resource_format.h

Index: cc/resources/resource_format.h
diff --git a/cc/resources/resource_format.h b/cc/resources/resource_format.h
index 79b815fcd297c73c1b922c98b608c2397c0be87e..42071555faca1bb538e8e90d1df5a609ca4ff5ff 100644
--- a/cc/resources/resource_format.h
+++ b/cc/resources/resource_format.h
@@ -31,6 +31,7 @@ enum ResourceFormat {
 };
 
 SkColorType ResourceFormatToSkColorType(ResourceFormat format);
+ResourceFormat SkColorTypeToResourceFormat(SkColorType color_type);
 
 CC_EXPORT int BitsPerPixel(ResourceFormat format);
 CC_EXPORT GLenum GLDataType(ResourceFormat format);
@@ -38,6 +39,9 @@ CC_EXPORT GLenum GLDataFormat(ResourceFormat format);
 CC_EXPORT GLenum GLInternalFormat(ResourceFormat format);
 CC_EXPORT gfx::BufferFormat BufferFormat(ResourceFormat format);
 
+bool IsResourceFormatCompressed(ResourceFormat format);
+bool DoesResourceFormatSupportAlpha(ResourceFormat format);
+
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_FORMAT_H_