Fix header guard and namespace in android_webview

android_webview/browser/renderer_host/aw_render_view_host_ext.h

Index: android_webview/browser/renderer_host/aw_render_view_host_ext.h
diff --git a/android_webview/browser/renderer_host/aw_render_view_host_ext.h b/android_webview/browser/renderer_host/aw_render_view_host_ext.h
index c0dcbdeea818e08f3bd83b0c6c5ef3dfb103c3d7..1a812578a286b60befda3f322abd25a4fc85839f 100644
--- a/android_webview/browser/renderer_host/aw_render_view_host_ext.h
+++ b/android_webview/browser/renderer_host/aw_render_view_host_ext.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 ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
-#define ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
+#ifndef ANDROID_WEBVIEW_BROWSER_RENDERER_HOST_AW_RENDER_VIEW_HOST_EXT_H_
+#define ANDROID_WEBVIEW_BROWSER_RENDERER_HOST_AW_RENDER_VIEW_HOST_EXT_H_
 
 #include "content/public/browser/web_contents_observer.h"
 
@@ -123,4 +123,4 @@ class AwRenderViewHostExt : public content::WebContentsObserver {
 
 }  // namespace android_webview
 
-#endif  // ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
+#endif  // ANDROID_WEBVIEW_BROWSER_RENDERER_HOST_AW_RENDER_VIEW_HOST_EXT_H_