publish canvas context API stat metrics

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 41 matching lines @@
 #include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutTheme.h"
 #include "modules/canvas2d/CanvasGradient.h"
 #include "modules/canvas2d/CanvasPattern.h"
 #include "modules/canvas2d/CanvasRenderingContext2DState.h"
 #include "modules/canvas2d/CanvasStyle.h"
 #include "modules/canvas2d/HitRegion.h"
 #include "modules/canvas2d/Path2D.h"
 #include "platform/fonts/FontCache.h"
 #include "platform/geometry/FloatQuad.h"
+#include "platform/graphics/CanvasMetrics.h"
 #include "platform/graphics/DrawLooperBuilder.h"
 #include "platform/graphics/ExpensiveCanvasHeuristicParameters.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/StrokeData.h"
 #include "platform/graphics/skia/SkiaUtils.h"
 #include "platform/text/BidiTextRun.h"
 #include "public/platform/Platform.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "wtf/ArrayBufferContents.h"
@@ skipping 54 matching lines @@
     , m_tryRestoreContextAttemptCount(0)
     , m_dispatchContextLostEventTimer(this, &CanvasRenderingContext2D::dispatchContextLostEvent)
     , m_dispatchContextRestoredEventTimer(this, &CanvasRenderingContext2D::dispatchContextRestoredEvent)
     , m_tryRestoreContextEventTimer(this, &CanvasRenderingContext2D::tryRestoreContextEvent)
     , m_pruneLocalFontCacheScheduled(false)
 {
     if (document.settings() && document.settings()->antialiasedClips2dCanvasEnabled())
         m_clipAntialiasing = AntiAliased;
     m_stateStack.append(CanvasRenderingContext2DState::create());
     setShouldAntialias(true);
+    CanvasMetrics::countCanvasContextStat(CanvasMetrics::CanvasContextCreated);

[Justin Novosad, 2015/11/20 03:30:44]

This should be more specific: I'd like 2DContextCreated, but C++ symbols can
only start with letters, so Canvas2DContextCreated would be okay

[zmin, 2015/11/20 17:08:33]

Removed.

 }
 
 void CanvasRenderingContext2D::unwindStateStack()
 {
     if (size_t stackSize = m_stateStack.size()) {
         if (SkCanvas* skCanvas = canvas()->existingDrawingCanvas()) {
             while (--stackSize)
                 skCanvas->restore();
         }
     }
@@ skipping 2187 matching lines @@
         if (imageType == CanvasRenderingContext2DState::NonOpaqueImage)
             return;
         if (alpha < 0xFF)
             return;
     }
 
     canvas()->buffer()->willOverwriteCanvas();
 }
 
 } // namespace blink