Add shared bitmap managers for browser and renderer processes.

content/browser/compositor/image_transport_factory.cc

Index: content/browser/compositor/image_transport_factory.cc
diff --git a/content/browser/compositor/image_transport_factory.cc b/content/browser/compositor/image_transport_factory.cc
index becdc68b73e62e66f31c68f00858475182d9efd9..d528ca8029c7791bacd8430a61e5b1404bfcfa61 100644
--- a/content/browser/compositor/image_transport_factory.cc
+++ b/content/browser/compositor/image_transport_factory.cc
@@ -6,6 +6,7 @@
 
 #include "content/browser/compositor/gpu_process_transport_factory.h"
 #include "content/browser/compositor/no_transport_image_transport_factory.h"
+#include "content/common/host_shared_bitmap_manager.h"
 #include "ui/compositor/compositor.h"
 
 namespace content {
@@ -22,6 +23,7 @@ void ImageTransportFactory::Initialize() {
     return;
   g_factory = new GpuProcessTransportFactory;
   ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
+  ui::Compositor::SetSharedBitmapManager(HostSharedBitmapManager::current());
 }
 
 void ImageTransportFactory::InitializeForUnitTests(