Insert pinch zoom virtual viewport layers to graphics layer tree.

Source/WebKit/chromium/src/PinchViewports.h

Index: Source/WebKit/chromium/src/PinchViewports.h
diff --git a/Source/core/platform/graphics/ContentDecryptionModuleSession.h b/Source/WebKit/chromium/src/PinchViewports.h
similarity index 50%
copy from Source/core/platform/graphics/ContentDecryptionModuleSession.h
copy to Source/WebKit/chromium/src/PinchViewports.h
index 30ead6fe8baefd3374c583e4f84459ec89709721..f1dbf6ecdc10d54aee93df43a493e82caa9d9ac4 100644
--- a/Source/core/platform/graphics/ContentDecryptionModuleSession.h
+++ b/Source/WebKit/chromium/src/PinchViewports.h
@@ -28,57 +28,61 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ContentDecryptionModuleSession_h
-#define ContentDecryptionModuleSession_h
+#ifndef PinchViewports_h
+#define PinchViewports_h
 
-#include "public/platform/WebContentDecryptionModuleSession.h"
+#include "core/platform/graphics/GraphicsLayerClient.h"
+#include "core/platform/graphics/IntSize.h"
+#include "public/platform/WebScrollbar.h"
+#include "public/platform/WebSize.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/text/WTFString.h"
 
-namespace WebKit {
-class WebContentDecryptionModule;
-}
-
-namespace WTF {
-class Uint8Array;
+namespace WebCore {
+class GraphicsContext;
+class GraphicsLayer;
+class IntRect;
+class IntSize;
 }
 
-namespace WebCore {
+namespace WebKit {
 
-class KURL;
+class WebLayerTreeView;
+class WebScrollbarLayer;
+class WebViewImpl;
 
-class ContentDecryptionModuleSessionClient {
+class PinchViewports : WebCore::GraphicsLayerClient {
 public:
-    enum MediaKeyErrorCode { UnknownError = 1, ClientError };
-    virtual void keyAdded() = 0;
-    virtual void keyError(MediaKeyErrorCode, unsigned long systemCode) = 0;
-    virtual void keyMessage(const unsigned char* message, size_t messageLength, const KURL& destinationURL) = 0;
-};
+    static PassOwnPtr<PinchViewports> create(WebViewImpl* owner);
+    ~PinchViewports();
 
-class ContentDecryptionModuleSession : private WebKit::WebContentDecryptionModuleSession::Client {
-public:
-    static PassOwnPtr<ContentDecryptionModuleSession> create(ContentDecryptionModuleSessionClient*);
+    void setOverflowControlsHostLayer(WebCore::GraphicsLayer*);
+    WebCore::GraphicsLayer* rootGraphicsLayer()
+    {
+        return m_innerViewportClipLayer.get();
+    }
+    void setViewportSize(const WebCore::IntSize&);
 
-    ContentDecryptionModuleSession(WebKit::WebContentDecryptionModule*, ContentDecryptionModuleSessionClient*);
-    ~ContentDecryptionModuleSession();
+    void registerViewportLayersWithTreeView(WebLayerTreeView*) const;
+    void clearViewportLayersForTreeView(WebLayerTreeView*) const;
 
-    String sessionId() const;
-    void generateKeyRequest(const String& mimeType, const WTF::Uint8Array& initData);
-    void update(const WTF::Uint8Array& key);
-    void close();
+    // GraphicsLayerClient implementation.
+    virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double time) OVERRIDE;
+    virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& inClip) OVERRIDE;
 
 private:
-    // WebKit::WebContentDecryptionModuleSession::Client
-    virtual void keyAdded() OVERRIDE;
-    virtual void keyError(MediaKeyErrorCode, unsigned long systemCode) OVERRIDE;
-    virtual void keyMessage(const unsigned char* message, size_t messageLength, const WebKit::WebURL& destinationURL) OVERRIDE;
+    explicit PinchViewports(WebViewImpl* owner);
 
-    OwnPtr<WebKit::WebContentDecryptionModuleSession> m_session;
+    void setupScrollbar(WebKit::WebScrollbar::Orientation);
 
-    ContentDecryptionModuleSessionClient* m_client;
+    WebViewImpl* m_owner;
+    OwnPtr<WebCore::GraphicsLayer> m_innerViewportClipLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_pageScaleLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_innerViewportScrollLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarHorizontal;
+    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarVertical;
 };
 
-} // namespace WebCore
+} // namespace WebKit
 
-#endif // ContentDecryptionModuleSession_h
+#endif // PinchViewports_h