cc: Route offscreen context creation for compositor to the browser.

cc/resource_provider.cc

Index: cc/resource_provider.cc
diff --git a/cc/resource_provider.cc b/cc/resource_provider.cc
index e6983543e480c9770a0e1437f55d97564db36837..b685c61406d1cdef315ae1d467211cb68bd4873a 100644
--- a/cc/resource_provider.cc
+++ b/cc/resource_provider.cc
@@ -11,6 +11,7 @@
 #include "base/stl_util.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
+#include "cc/ganesh_context_provider.h"
 #include "cc/gl_renderer.h" // For the GLC() macro.
 #include "cc/platform_color.h"
 #include "cc/texture_uploader.h"
@@ -576,6 +577,7 @@ ResourceProvider::ResourceProvider(OutputSurface* context)
     , m_useShallowFlush(false)
     , m_maxTextureSize(0)
     , m_bestTextureFormat(0)
+    , m_ganeshContextProvider(GaneshContextProvider::Create())
 {
 }
 
@@ -1084,4 +1086,8 @@ void ResourceProvider::enableReadLockFences(ResourceProvider::ResourceId id, boo
     resource->enableReadLockFences = enable;
 }
 
+void ResourceProvider::setGaneshContexts(WebKit::WebGraphicsContext3D* context3d, GrContext* grContext) {
+    m_ganeshContextProvider->set_contexts(context3d, grContext);
+}
+
 }  // namespace cc