Add shared bitmap managers for browser and renderer processes.

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 2da23fd61bce55bfe85991c687b2e9b48a06008d..86688b1e114415af6fb6ba95110f0a90de03944b 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -45,6 +45,7 @@ enum SwapType {
 
 bool g_compositor_initialized = false;
 base::Thread* g_compositor_thread = NULL;
+cc::SharedBitmapManager* g_shared_bitmap_manager;
 
 ui::ContextFactory* g_context_factory = NULL;
 
@@ -246,9 +247,13 @@ Compositor::Compositor(gfx::AcceleratedWidget widget)
   base::TimeTicks before_create = base::TimeTicks::Now();
   if (!!g_compositor_thread) {
     host_ = cc::LayerTreeHost::CreateThreaded(
-        this, NULL, settings, g_compositor_thread->message_loop_proxy());
+        this,
+        g_shared_bitmap_manager,
+        settings,
+        g_compositor_thread->message_loop_proxy());
   } else {
-    host_ = cc::LayerTreeHost::CreateSingleThreaded(this, this, NULL, settings);
+    host_ = cc::LayerTreeHost::CreateSingleThreaded(
+        this, this, g_shared_bitmap_manager, settings);
   }
   UMA_HISTOGRAM_TIMES("GPU.CreateBrowserCompositor",
                       base::TimeTicks::Now() - before_create);
@@ -317,6 +322,11 @@ void Compositor::Terminate() {
   g_compositor_initialized = false;
 }
 
+// static
+void Compositor::SetSharedBitmapManager(cc::SharedBitmapManager* manager) {
+  g_shared_bitmap_manager = manager;
+}
+
 void Compositor::ScheduleDraw() {
   if (g_compositor_thread) {
     host_->Composite(gfx::FrameTime::Now());