Upgrade PixelStorei to ES3/WebGL2.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
index 3ab1aad20babffd691efbe1d197ef173b49c5bed..d9a0f2cb04385a895aee937a141f7d80a664651d 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
@@ -175,6 +175,7 @@ public:
     ScriptValue getParameter(ScriptState*, GLenum pname) override;
     ScriptValue getTexParameter(ScriptState*, GLenum target, GLenum pname) override;
     ScriptValue getFramebufferAttachmentParameter(ScriptState*, GLenum target, GLenum attachment, GLenum pname) override;
+    void pixelStorei(GLenum pname, GLint param) override;
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, DOMArrayBufferView* pixels) override;
     void restoreCurrentFramebuffer() override;
 
@@ -232,6 +233,11 @@ protected:
 
     void removeBoundBuffer(WebGLBuffer*) override;
 
+    // Set UNPACK_ALIGNMENT to 1, all other parameters to 0.
+    void resetUnpackParameters();
+    // Restore the client unset parameters.
+    void restoreUnpackParameters();
+
     PersistentWillBeMember<WebGLFramebuffer> m_readFramebufferBinding;
     PersistentWillBeMember<WebGLTransformFeedback> m_transformFeedbackBinding;
     GLint m_maxArrayTextureLayers;
@@ -252,6 +258,15 @@ protected:
     PersistentWillBeMember<WebGLQuery> m_currentBooleanOcclusionQuery;
     PersistentWillBeMember<WebGLQuery> m_currentTransformFeedbackPrimitivesWrittenQuery;
     PersistentHeapVectorWillBeHeapVector<Member<WebGLSampler>> m_samplerUnits;
+
+    GLint m_packRowLength;
+    GLint m_packSkipPixels;
+    GLint m_packSkipRows;
+    GLint m_unpackRowLength;
+    GLint m_unpackImageHeight;
+    GLint m_unpackSkipPixels;
+    GLint m_unpackSkipRows;
+    GLint m_unpackSkipImages;
 };
 
 DEFINE_TYPE_CASTS(WebGL2RenderingContextBase, CanvasRenderingContext, context,