Implementing FlushMappedBufferRange in GPU command buffer.

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 a3e11c64805ec86969daeebd2ca819b8cd57c7a6..45432412dd785b2e526cf0e5be2d84b3fe0950eb 100644
--- a/gpu/command_buffer/client/gles2_c_lib_autogen.h
+++ b/gpu/command_buffer/client/gles2_c_lib_autogen.h
@@ -1246,6 +1246,11 @@ void* GL_APIENTRY GLES2MapBufferRange(GLenum target,
 GLboolean GL_APIENTRY GLES2UnmapBuffer(GLenum target) {
   return gles2::GetGLContext()->UnmapBuffer(target);
 }
+void GL_APIENTRY GLES2FlushMappedBufferRange(GLenum target,
+                                             GLintptr offset,
+                                             GLsizeiptr size) {
+  gles2::GetGLContext()->FlushMappedBufferRange(target, offset, size);
+}
 void* GL_APIENTRY GLES2MapTexSubImage2DCHROMIUM(GLenum target,
                                                 GLint level,
                                                 GLint xoffset,
@@ -2658,6 +2663,10 @@ extern const NameToFunc g_gles2_function_table[] = {
         "glUnmapBuffer", reinterpret_cast<GLES2FunctionPointer>(glUnmapBuffer),
     },
     {
+        "glFlushMappedBufferRange",
+        reinterpret_cast<GLES2FunctionPointer>(glFlushMappedBufferRange),
+    },
+    {
         "glMapTexSubImage2DCHROMIUM",
         reinterpret_cast<GLES2FunctionPointer>(glMapTexSubImage2DCHROMIUM),
     },