Cleanup: Fix content header include guards.

content/renderer/pepper/pepper_compositor_host.h

Index: content/renderer/pepper/pepper_compositor_host.h
diff --git a/content/renderer/pepper/pepper_compositor_host.h b/content/renderer/pepper/pepper_compositor_host.h
index 6de6d28614318cddca3de6d0376d2400ceb55e68..cd17aef4c9f4737f7f1c2f8db8c571e1b13fd1de 100644
--- a/content/renderer/pepper/pepper_compositor_host.h
+++ b/content/renderer/pepper/pepper_compositor_host.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_
-#define CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_
+#ifndef CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_HOST_H_
+#define CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_HOST_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ -100,4 +100,4 @@ class PepperCompositorHost : public ppapi::host::ResourceHost {
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_
+#endif  // CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_HOST_H_