Add calls to inform gpu of browser window count

content/browser/gpu/gpu_data_manager_impl.cc

Index: content/browser/gpu/gpu_data_manager_impl.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl.cc b/content/browser/gpu/gpu_data_manager_impl.cc
index 07a59531f14b87934fade2c3cda0e0e229655735..923aecd18a95aaae9e1efce3d91753d77b2563b7 100644
--- a/content/browser/gpu/gpu_data_manager_impl.cc
+++ b/content/browser/gpu/gpu_data_manager_impl.cc
@@ -76,7 +76,8 @@ GpuDataManagerImpl::GpuDataManagerImpl()
       observer_list_(new GpuDataManagerObserverList),
       software_rendering_(false),
       card_blacklisted_(false),
-      update_histograms_(true) {
+      update_histograms_(true),
+      window_count_(0) {
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kDisableAcceleratedCompositing)) {
     command_line->AppendSwitch(switches::kDisableAccelerated2dCanvas);
@@ -285,6 +286,22 @@ void GpuDataManagerImpl::RemoveObserver(GpuDataManagerObserver* observer) {
   observer_list_->RemoveObserver(observer);
 }
 
+void GpuDataManagerImpl::SetWindowCount(uint32 count) {
+  {
+    base::AutoLock auto_lock(gpu_info_lock_);
+    window_count_ = count;
+  }
+  GpuProcessHost::SendOnIO(
+      GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
+      content::CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH,
+      new GpuMsg_SetVideoMemoryWindowCount(count));
+}
+
+uint32 GpuDataManagerImpl::GetWindowCount() const {
+  base::AutoLock auto_lock(gpu_info_lock_);
+  return window_count_;
+}
+
 void GpuDataManagerImpl::AppendRendererCommandLine(
     CommandLine* command_line) const {
   DCHECK(command_line);