Dump DisplayListRasterSource memory

cc/playback/display_list_raster_source.h

 // Copyright 2014 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_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
 #define CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/memory_dump_provider.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/playback/display_list_recording_source.h"
 #include "skia/ext/analysis_canvas.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace cc {
 class DisplayItemList;
 class DrawImage;
 class ImageDecodeController;
 
 class CC_EXPORT DisplayListRasterSource
-    : public base::RefCountedThreadSafe<DisplayListRasterSource> {
+    : public base::trace_event::MemoryDumpProvider,
+      public base::RefCountedThreadSafe<DisplayListRasterSource> {
  public:
   static scoped_refptr<DisplayListRasterSource>
   CreateFromDisplayListRecordingSource(const DisplayListRecordingSource* other,
                                        bool can_use_lcd_text);
 
   // Raster a subrect of this RasterSource into the given canvas. It is
   // assumed that contents_scale has already been applied to this canvas.
   // Writes the total number of pixels rasterized and the time spent
   // rasterizing to the stats if the respective pointer is not nullptr.
   // It is assumed that the canvas passed here will only be rasterized by
@@ skipping 66 matching lines @@
 
   // Return true if LCD anti-aliasing may be used when rastering text.
   virtual bool CanUseLCDText() const;
 
   scoped_refptr<DisplayListRasterSource> CreateCloneWithoutLCDText() const;
 
   // Image decode controller should be set once. Its lifetime has to exceed that
   // of the raster source, since the raster source will access it during raster.
   void SetImageDecodeController(ImageDecodeController* image_decode_controller);
 
+  // base::trace_event::MemoryDumpProvider implementation
+  bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
+                    base::trace_event::ProcessMemoryDump* pmd) override;
+
  protected:
   friend class base::RefCountedThreadSafe<DisplayListRasterSource>;
 
   DisplayListRasterSource(const DisplayListRecordingSource* other,
                           bool can_use_lcd_text);
   DisplayListRasterSource(const DisplayListRasterSource* other,
                           bool can_use_lcd_text);
-  virtual ~DisplayListRasterSource();
+  ~DisplayListRasterSource() override;
 
   // These members are const as this raster source may be in use on another
   // thread and so should not be touched after construction.
   const scoped_refptr<DisplayItemList> display_list_;
   const size_t painter_reported_memory_usage_;
   const SkColor background_color_;
   const bool requires_clear_;
   const bool can_use_lcd_text_;
   const bool is_solid_color_;
   const SkColor solid_color_;
@@ skipping 20 matching lines @@
                     SkPicture::AbortCallback* callback,
                     const gfx::Rect& canvas_bitmap_rect,
                     const gfx::Rect& canvas_playback_rect,
                     float contents_scale) const;
 
   void PrepareForPlaybackToCanvas(SkCanvas* canvas,
                                   const gfx::Rect& canvas_bitmap_rect,
                                   const gfx::Rect& canvas_playback_rect,
                                   float contents_scale) const;
 
+  // Used to ensure that memory dump logic always happens on the same thread.
+  base::ThreadChecker memory_dump_thread_checker_;
+
   DISALLOW_COPY_AND_ASSIGN(DisplayListRasterSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_