Move flush id from WebGraphicsContext3DImpl to GLES2Implementation.

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 1aa3cbde1f580bee666065f3ac898d4dca59bc87..67f1e055def71ca49ceb48196c96f189df3d4456 100644
--- a/gpu/command_buffer/client/gles2_c_lib_autogen.h
+++ b/gpu/command_buffer/client/gles2_c_lib_autogen.h
@@ -1523,6 +1523,9 @@ void GL_APIENTRY GLES2SwapInterval(GLint interval) {
 void GL_APIENTRY GLES2FlushDriverCachesCHROMIUM() {
   gles2::GetGLContext()->FlushDriverCachesCHROMIUM();
 }
+GLuint GL_APIENTRY GLES2GetLastFlushIdCHROMIUM() {
+  return gles2::GetGLContext()->GetLastFlushIdCHROMIUM();
+}
 void GL_APIENTRY GLES2MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) {
   gles2::GetGLContext()->MatrixLoadfCHROMIUM(matrixMode, m);
 }
@@ -2888,6 +2891,10 @@ extern const NameToFunc g_gles2_function_table[] = {
         reinterpret_cast<GLES2FunctionPointer>(glFlushDriverCachesCHROMIUM),
     },
     {
+        "glGetLastFlushIdCHROMIUM",
+        reinterpret_cast<GLES2FunctionPointer>(glGetLastFlushIdCHROMIUM),
+    },
+    {
         "glMatrixLoadfCHROMIUM",
         reinterpret_cast<GLES2FunctionPointer>(glMatrixLoadfCHROMIUM),
     },