cc: Make images that can't possibly fit in cache not checker.

cc/raster/image_hijack_canvas_unittest.cc

Index: cc/raster/image_hijack_canvas_unittest.cc
diff --git a/cc/raster/image_hijack_canvas_unittest.cc b/cc/raster/image_hijack_canvas_unittest.cc
index 070070f263263a7b9b4b3f3234a75a46b32a7bd4..25a6ba140d7efeaa1ac71447be09b7f24289ddb6 100644
--- a/cc/raster/image_hijack_canvas_unittest.cc
+++ b/cc/raster/image_hijack_canvas_unittest.cc
@@ -32,6 +32,7 @@ class MockImageDecodeCache : public ImageDecodeCache {
   MOCK_METHOD0(ClearCache, void());
   MOCK_METHOD2(GetOutOfRasterDecodeTaskForImageAndRef,
                bool(const DrawImage& image, scoped_refptr<TileTask>* task));
+  MOCK_CONST_METHOD0(GetMaximumMemoryLimitBytes, size_t());
 };
 
 TEST(ImageHijackCanvasTest, NonLazyImagesSkipped) {