Upgrade blink side ReadPixels size validation to consider ES3 pack parameters.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.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 WebGL2RenderingContextBase_h
 #define WebGL2RenderingContextBase_h
 
 #include "modules/webgl/WebGLExtension.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
@@ skipping 194 matching lines @@
     void texSubImage3DImpl(GLenum, GLint, GLint, GLint, GLint, GLenum, GLenum, Image*, WebGLImageConversion::ImageHtmlDomSource, bool, bool);
     void samplerParameter(WebGLSampler*, GLenum, GLfloat, GLint, bool);
 
     bool isBufferBoundToTransformFeedback(WebGLBuffer*);
     bool isBufferBoundToNonTransformFeedback(WebGLBuffer*);
     bool validateBufferTargetCompatibility(const char*, GLenum, WebGLBuffer*);
 
     bool validateBufferBaseTarget(const char* functionName, GLenum target);
     bool validateAndUpdateBufferBindBaseTarget(const char* functionName, GLenum, GLuint, WebGLBuffer*);
 
+    WebGLImageConversion::PixelStoreParams getPackPixelStoreParams() override;
+    WebGLImageConversion::PixelStoreParams getUnpackPixelStoreParams() override;
+
     bool checkAndTranslateAttachments(const char* functionName, GLenum, const Vector<GLenum>&, Vector<GLenum>&);
 
     /* WebGLRenderingContextBase overrides */
     unsigned getMaxWebGLLocationLength() const override { return 1024; };
     bool validateCapability(const char* functionName, GLenum) override;
     bool validateBufferTarget(const char* functionName, GLenum target) override;
     bool validateAndUpdateBufferBindTarget(const char* functionName, GLenum, WebGLBuffer*) override;
     WebGLTexture* validateTextureBinding(const char* functionName, GLenum target, bool useSixEnumsForCubeMap) override;
     bool validateFramebufferTarget(GLenum target) override;
     bool validateReadPixelsFormatAndType(GLenum format, GLenum type) override;
@@ skipping 54 matching lines @@
     GLint m_unpackSkipImages;
 };
 
 DEFINE_TYPE_CASTS(WebGL2RenderingContextBase, CanvasRenderingContext, context,
     context->is3d() && WebGLRenderingContextBase::getWebGLVersion(context) >= 2,
     context.is3d() && WebGLRenderingContextBase::getWebGLVersion(&context) >= 2);
 
 } // namespace blink
 
 #endif