Improved Pinch-Zoom for PDF.

pdf/paint_manager.h

Index: pdf/paint_manager.h
diff --git a/pdf/paint_manager.h b/pdf/paint_manager.h
index dd99f9d2a61f4203be6d884667a268783a3f6ad7..28d45067c2477c6bc52677bf811dfef32974b88c 100644
--- a/pdf/paint_manager.h
+++ b/pdf/paint_manager.h
@@ -146,6 +146,12 @@ class PaintManager {
   pp::Size GetEffectiveSize() const;
   float GetEffectiveDeviceScale() const;
 
+  // Set the transform for the graphics layer.
+  void SetTransform(float scale,
+                    const pp::Point& origin,
+                    const pp::Point& translate);
+  void SetTransform(float scale);
+
  private:
   // Disallow copy and assign (these are unimplemented).
   PaintManager(const PaintManager&);
@@ -160,6 +166,9 @@ class PaintManager {
   // Does the client paint and executes a Flush if necessary.
   void DoPaint();
 
+  // Executes a Flush
+  void Flush();
+
   // Callback for asynchronous completion of Flush.
   void OnFlushComplete(int32_t);
 
@@ -185,6 +194,7 @@ class PaintManager {
   // See comment for EnsureCallbackPending for more on how these work.
   bool manual_callback_pending_;
   bool flush_pending_;
+  bool flush_requested_;
 
   // When we get a resize, we don't bind right away (see SetSize). The
   // has_pending_resize_ tells us that we need to do a resize for the next