cc: Rename ImageDecodeController to ImageDecodeCache.

cc/test/fake_tile_manager.h

Index: cc/test/fake_tile_manager.h
diff --git a/cc/test/fake_tile_manager.h b/cc/test/fake_tile_manager.h
index 0a20aac686a2a9c7322a50a306b3b13aec6a1062..d5dde70ed62fa7f74066334e5dff42d0c3ba6c24 100644
--- a/cc/test/fake_tile_manager.h
+++ b/cc/test/fake_tile_manager.h
@@ -8,7 +8,7 @@
 #include <set>
 #include <vector>
 
-#include "cc/tiles/software_image_decode_controller.h"
+#include "cc/tiles/software_image_decode_cache.h"
 #include "cc/tiles/tile_manager.h"
 
 namespace cc {
@@ -28,7 +28,7 @@ class FakeTileManager : public TileManager {
   std::vector<Tile*> tiles_for_raster;
 
  private:
-  SoftwareImageDecodeController image_decode_controller_;
+  SoftwareImageDecodeCache image_decode_cache_;
 };
 
 }  // namespace cc