Migrate WebGL contexts on backgrounded tabs to the integrated GPU.

gpu/command_buffer/client/gles2_c_lib_autogen.h

Index: gpu/command_buffer/client/gles2_c_lib_autogen.h
diff --git a/gpu/command_buffer/client/gles2_c_lib_autogen.h b/gpu/command_buffer/client/gles2_c_lib_autogen.h
index 77720ecfe7469a06ffa6d799936fadcde2ecb38d..b9587f553434eb2702bc7be76c811e157dbc4223 100644
--- a/gpu/command_buffer/client/gles2_c_lib_autogen.h
+++ b/gpu/command_buffer/client/gles2_c_lib_autogen.h
@@ -1727,6 +1727,9 @@ void GL_APIENTRY GLES2SwapBuffersWithDamageCHROMIUM(GLint x,
                                                     GLint height) {
   gles2::GetGLContext()->SwapBuffersWithDamageCHROMIUM(x, y, width, height);
 }
+void GL_APIENTRY GLES2PerformanceHintCHROMIUM(GLenum mode) {
+  gles2::GetGLContext()->PerformanceHintCHROMIUM(mode);
+}
 
 namespace gles2 {
 
@@ -3035,6 +3038,10 @@ extern const NameToFunc g_gles2_function_table[] = {
         reinterpret_cast<GLES2FunctionPointer>(glSwapBuffersWithDamageCHROMIUM),
     },
     {
+        "glPerformanceHintCHROMIUM",
+        reinterpret_cast<GLES2FunctionPointer>(glPerformanceHintCHROMIUM),
+    },
+    {
         NULL, NULL,
     },
 };