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

cc/test/fake_display_list_raster_source.cc

 // 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.
 
 #include "cc/test/fake_display_list_raster_source.h"
 
 #include <limits>
 
 #include "base/synchronization/waitable_event.h"
 #include "cc/test/fake_display_list_recording_source.h"
@@ skipping 115 matching lines @@
     bool can_use_lcd,
     base::WaitableEvent* playback_allowed_event) {
   return make_scoped_refptr(new FakeDisplayListRasterSource(
       recording_source, can_use_lcd, playback_allowed_event));
 }
 
 FakeDisplayListRasterSource::FakeDisplayListRasterSource(
     const DisplayListRecordingSource* recording_source,
     bool can_use_lcd)
     : DisplayListRasterSource(recording_source, can_use_lcd),
+      is_solid_color_(false),
+      is_solid_color_overridden_(false),
       playback_allowed_event_(nullptr) {}
 
 FakeDisplayListRasterSource::FakeDisplayListRasterSource(
     const DisplayListRecordingSource* recording_source,
     bool can_use_lcd,
     base::WaitableEvent* playback_allowed_event)
     : DisplayListRasterSource(recording_source, can_use_lcd),
+      is_solid_color_(false),
+      is_solid_color_overridden_(false),
       playback_allowed_event_(playback_allowed_event) {}
 
 FakeDisplayListRasterSource::~FakeDisplayListRasterSource() {}
 
 void FakeDisplayListRasterSource::PlaybackToCanvas(
     SkCanvas* canvas,
     const gfx::Rect& canvas_bitmap_rect,
     const gfx::Rect& canvas_playback_rect,
     float contents_scale) const {
   if (playback_allowed_event_)
     playback_allowed_event_->Wait();
   DisplayListRasterSource::PlaybackToCanvas(
       canvas, canvas_bitmap_rect, canvas_playback_rect, contents_scale);
 }
 
+bool FakeDisplayListRasterSource::IsSolidColor() const {
+  return is_solid_color_overridden_ ? is_solid_color_
+                                    : DisplayListRasterSource::IsSolidColor();
+}
+
 }  // namespace cc