Revert of Remove code used by --disable-delegated-renderer on Mac

content/browser/renderer_host/compositing_iosurface_context_mac.h

Index: content/browser/renderer_host/compositing_iosurface_context_mac.h
diff --git a/content/browser/renderer_host/compositing_iosurface_context_mac.h b/content/browser/renderer_host/compositing_iosurface_context_mac.h
index 5468da2c22cda36ef43af3fd0785615d129012f9..316940169fc791fd2c3eb2abbf818839549fd85c 100644
--- a/content/browser/renderer_host/compositing_iosurface_context_mac.h
+++ b/content/browser/renderer_host/compositing_iosurface_context_mac.h
@@ -18,6 +18,8 @@
 #include "ui/gl/scoped_cgl.h"
 
 namespace content {
+
+class CompositingIOSurfaceShaderPrograms;
 
 class CompositingIOSurfaceContext
     : public base::RefCounted<CompositingIOSurfaceContext>,
@@ -44,6 +46,9 @@
   void PoisonContextAndSharegroup();
   bool HasBeenPoisoned() const { return poisoned_; }
 
+  CompositingIOSurfaceShaderPrograms* shader_program_cache() const {
+    return shader_program_cache_.get();
+  }
   CGLContextObj cgl_context() const { return cgl_context_; }
   int window_number() const { return window_number_; }
 
@@ -56,7 +61,8 @@
   CompositingIOSurfaceContext(
       int window_number,
       base::ScopedTypeRef<CGLContextObj> clg_context_strong,
-      CGLContextObj clg_context);
+      CGLContextObj clg_context,
+      scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache);
   virtual ~CompositingIOSurfaceContext();
 
   int window_number_;
@@ -64,6 +70,7 @@
   // Weak, backed by |cgl_context_strong_|.
   CGLContextObj cgl_context_;
 
+  scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache_;
   bool poisoned_;
 
   // The global map from window number and window ordering to