cc: Re-enable disabled tile manager unittests (plus fixes)

cc/test/fake_display_list_raster_source.h

 // Copyright 2015 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_TEST_FAKE_DISPLAY_LIST_RASTER_SOURCE_H_
 #define CC_TEST_FAKE_DISPLAY_LIST_RASTER_SOURCE_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/playback/display_list_raster_source.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 25 matching lines @@
   static scoped_refptr<FakeDisplayListRasterSource>
   CreateFromRecordingSourceWithWaitable(
       const DisplayListRecordingSource* recording_source,
       bool can_use_lcd,
       base::WaitableEvent* playback_allowed_event);
 
   void PlaybackToCanvas(SkCanvas* canvas,
                         const gfx::Rect& canvas_bitmap_rect,
                         const gfx::Rect& canvas_playback_rect,
                         float contents_scale) const override;
+  bool IsSolidColor() const override;
+
+  void set_is_solid_color(bool is_solid) {
+    is_solid_color_ = is_solid;
+    is_solid_color_overridden_ = true;
+  }
 
  protected:
   FakeDisplayListRasterSource(
       const DisplayListRecordingSource* recording_source,
       bool can_use_lcd);
   FakeDisplayListRasterSource(
       const DisplayListRecordingSource* recording_source,
       bool can_use_lcd,
       base::WaitableEvent* playback_allowed_event);
   ~FakeDisplayListRasterSource() override;
 
  private:
+  bool is_solid_color_;
+  bool is_solid_color_overridden_;
   base::WaitableEvent* playback_allowed_event_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_DISPLAY_LIST_RASTER_SOURCE_H_