Re-enable canvas optimization for getImageData with new codepath

third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.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 ExpensiveCanvasHeuristicParameters_h
 #define ExpensiveCanvasHeuristicParameters_h
 
 namespace blink {
 
 namespace ExpensiveCanvasHeuristicParameters {
@@ skipping 47 matching lines @@
 
     // Pixel count beyond which we should always prefer to use display
     // lists. Rationale: The allocation of large textures for canvas
     // tends to starve the compositor, and increase the probability of
     // failure of subsequent allocations required for double buffering.
     PreferDisplayListOverGpuSizeThreshold = 4096 * 4096,
 
     // Disable Acceleration heuristic parameters
     //===========================================
 
-    GetImageDataForcesNoAcceleration = 0, // Disabled for crbug.com/626188
+    GetImageDataForcesNoAcceleration = 1,
 
 }; // enum
 
 
 // Constants and Coefficients for 2D Canvas Dynamic Rendering Mode Switching
 // =========================================================================
 
 // Approximate relative costs of different types of operations for the
 // accelerated rendering pipeline and the recording rendering pipeline.
 // These costs were estimated experimentally based on the performance
@@ skipping 29 matching lines @@
 // before the rendering pipeline may be switched. Having this set
 // to more than 1 increases the sample size of usage data before a
 // decision is made, improving the accuracy of heuristics.
 const int MinFramesBeforeSwitch = 3;
 
 } // namespace ExpensiveCanvasHeuristicParameters
 
 } // namespace blink
 
 #endif