Fixing gpu_ipc_browsertests.cc

webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc

Index: webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
index 203ffac8301e2ff92fc87a4a4805019c8656e52b..c193946c6d94c319122d278af927251f633ba3aa 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
@@ -1237,7 +1237,10 @@ void WebGraphicsContext3DInProcessCommandBufferImpl::signalSyncPoint(
   // Take ownership of the callback.
   context_->SignalSyncPoint(
       sync_point, base::Bind(&OnSignalSyncPoint, base::Owned(callback)));
-  // Stick something in the command buffer.
+  // Make sure we have something to flush, or shallowFlushCHROMIUM()
+  // doesn't do anything.
+  gl_->helper()->Noop(1);
+  // This fill force PumpCommands() to run which is what triggers the signal.
   shallowFlushCHROMIUM();
 }