[Android] Fix component build again.

content/public/browser/android/synchronous_compositor.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 
+#include "content/common/content_export.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 class SkCanvas;
 
 namespace gfx {
 class Transform;
 };
 
 namespace content {
 
 class WebContents;
 
 class SynchronousCompositorClient;
 
 // Interface for embedders that wish to direct compositing operations
 // synchronously under their own control. Only meaningful when the
 // kEnableSyncrhonousRendererCompositor flag is specified.
-class SynchronousCompositor {
+class CONTENT_EXPORT SynchronousCompositor {
  public:
   // Must be called once per WebContents instance. Will create the compositor
   // instance as needed, but only if |client| is non-NULL.
   static void SetClientForWebContents(WebContents* contents,
                                       SynchronousCompositorClient* client);
 
   // Allows changing or resetting the client to NULL (this must be used if
   // the client is being deleted prior to the DidDestroyCompositor() call
   // being received by the client). Ownership of |client| remains with
   // the caller.
@@ skipping 19 matching lines @@
   // SynchronousCompositorClient::GetTotalRootLayerScrollOffset).
   virtual void DidChangeRootLayerScrollOffset() = 0;
 
  protected:
   virtual ~SynchronousCompositor() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_