Revert of gpu: Move ShaderDiskCache into //gpu/ipc/host component.

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index f337a9be02b9a004521ec1de9f5edaca95fefb1f..816bcbbfd08a467aa37dc20db630a83b4db86942 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -42,7 +42,6 @@
 
 namespace gpu {
 struct GpuPreferences;
-class ShaderDiskCache;
 struct SyncToken;
 }
 
@@ -53,6 +52,7 @@
 namespace content {
 class BrowserChildProcessHostImpl;
 class InProcessChildThreadParams;
+class ShaderDiskCache;
 
 typedef base::Thread* (*GpuMainThreadFactoryFunction)(
     const InProcessChildThreadParams&, const gpu::GpuPreferences&);
@@ -282,7 +282,7 @@
   // automatic execution of 3D content from those domains.
   std::multiset<GURL> urls_with_live_offscreen_contexts_;
 
-  typedef std::map<int32_t, scoped_refptr<gpu::ShaderDiskCache>>
+  typedef std::map<int32_t, scoped_refptr<ShaderDiskCache>>
       ClientIdToShaderCacheMap;
   ClientIdToShaderCacheMap client_id_to_shader_cache_;