Hookup android_webview scroll offset delegation to Java side.

android_webview/browser/in_process_view_renderer.h

Index: android_webview/browser/in_process_view_renderer.h
diff --git a/android_webview/browser/in_process_view_renderer.h b/android_webview/browser/in_process_view_renderer.h
index 55d5415be40deccabba0173b6cdef882ddf1ea3d..27cf399abae19897fb9b772c609175a489ebcb01 100644
--- a/android_webview/browser/in_process_view_renderer.h
+++ b/android_webview/browser/in_process_view_renderer.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/android/synchronous_compositor_client.h"
+#include "ui/gfx/vector2d_f.h"
 
 namespace content {
 class SynchronousCompositor;
@@ -37,7 +38,7 @@ class InProcessViewRenderer : public BrowserViewRenderer,
       content::ContentViewCore* content_view_core) OVERRIDE;
   virtual bool OnDraw(jobject java_canvas,
                       bool is_hardware_canvas,
-                      const gfx::Point& scroll,
+                      const gfx::Vector2d& scroll_pix,
                       const gfx::Rect& clip) OVERRIDE;
   virtual void DrawGL(AwDrawGLInfo* draw_info) OVERRIDE;
   virtual base::android::ScopedJavaLocalRef<jobject> CapturePicture() OVERRIDE;
@@ -45,6 +46,7 @@ class InProcessViewRenderer : public BrowserViewRenderer,
   virtual void OnVisibilityChanged(
       bool view_visible, bool window_visible) OVERRIDE;
   virtual void OnSizeChanged(int width, int height) OVERRIDE;
+  virtual void ScrollTo(gfx::Vector2dF new_value_css) OVERRIDE;

[joth, 2013/06/18 03:19:50]

ah ha! over here you call it CSS pixels :)

[mkosiba (inactive), 2013/06/18 18:09:25]

see? making it explicit is paying off already :)

   virtual void OnAttachedToWindow(int width, int height) OVERRIDE;
   virtual void OnDetachedFromWindow() OVERRIDE;
   virtual bool IsAttachedToWindow() OVERRIDE;
@@ -95,9 +97,10 @@ class InProcessViewRenderer : public BrowserViewRenderer,
   EGLContext egl_context_at_init_;
 
   // Last View scroll when View.onDraw() was called.
-  gfx::Point scroll_at_start_of_frame_;
+  gfx::Vector2d scroll_at_start_of_frame_pix_;
 
-  gfx::Vector2dF scroll_offset_;
+  // Current scroll offset in CSS pixels.
+  gfx::Vector2dF scroll_offset_css_;
 
   base::WeakPtrFactory<InProcessViewRenderer> weak_factory_;