Revert of Update robust read pixels to output number of columns and rows written.

ui/gl/gl_mock_autogen_gl.h

Index: ui/gl/gl_mock_autogen_gl.h
diff --git a/ui/gl/gl_mock_autogen_gl.h b/ui/gl/gl_mock_autogen_gl.h
index 60d1d2ee77682d25de4b9ddaa63f86b5467c90c3..82525d6660523d68b54adb9a5fc26767e794f854 100644
--- a/ui/gl/gl_mock_autogen_gl.h
+++ b/ui/gl/gl_mock_autogen_gl.h
@@ -865,8 +865,16 @@
 MOCK_METHOD2(PushGroupMarkerEXT, void(GLsizei length, const char* marker));
 MOCK_METHOD2(QueryCounter, void(GLuint id, GLenum target));
 MOCK_METHOD1(ReadBuffer, void(GLenum src));
-// TODO(zmo): crbug.com/456340
-// glReadnPixelsRobustANGLE cannot be mocked because it has 11 args.
+MOCK_METHOD9(ReadnPixelsRobustANGLE,
+             void(GLint x,
+                  GLint y,
+                  GLsizei width,
+                  GLsizei height,
+                  GLenum format,
+                  GLenum type,
+                  GLsizei bufSize,
+                  GLsizei* length,
+                  void* data));
 MOCK_METHOD7(ReadPixels,
              void(GLint x,
                   GLint y,
@@ -875,8 +883,16 @@
                   GLenum format,
                   GLenum type,
                   void* pixels));
-// TODO(zmo): crbug.com/456340
-// glReadPixelsRobustANGLE cannot be mocked because it has 11 args.
+MOCK_METHOD9(ReadPixelsRobustANGLE,
+             void(GLint x,
+                  GLint y,
+                  GLsizei width,
+                  GLsizei height,
+                  GLenum format,
+                  GLenum type,
+                  GLsizei bufSize,
+                  GLsizei* length,
+                  void* pixels));
 MOCK_METHOD0(ReleaseShaderCompiler, void());
 MOCK_METHOD4(
     RenderbufferStorageEXT,