Add overscroll edge effect animations for Android.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 6d44e042af538f17c108e45c3c0b3dc3706ee2b3..75eb6e8f9cd1c497376c08c0a4cd0396b71eadc8 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -10,6 +10,7 @@ import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Rect;
@@ -554,6 +555,9 @@ public class ContentViewCore implements MotionEventDelegate, NavigationClient {
 
         initPopupZoomer(mContext);
         mImeAdapter = createImeAdapter(mContext);
+
+        initOverscrollResources(mContext);
+
         TraceEvent.end();
     }
 
@@ -614,6 +618,14 @@ public class ContentViewCore implements MotionEventDelegate, NavigationClient {
         mPopupZoomer.setOnTapListener(listener);
     }
 
+    private void initOverscrollResources(Context context) {

[mkosiba (inactive), 2013/04/18 11:11:28]

make this resilient to the resources not existing. When ContentViewCore is used
in android_webview mode these resources will not be provided (their id's will be
0).

[jdduke (slow), 2013/04/18 15:18:35]

This is all going away =/ Resource acquisition will be behind a flag, and pulled
from native code.  

+        Bitmap edge = BitmapFactory.decodeResource(mContext.getResources(),
+                                                   R.drawable.overscroll_edge);
+        Bitmap glow = BitmapFactory.decodeResource(mContext.getResources(),
+                                                   R.drawable.overscroll_glow);
+        setOverscrollResources(edge, glow);
+    }
+
     /**
      * @return Whether the configured personality of this ContentView is {@link #PERSONALITY_VIEW}.
      */
@@ -710,6 +722,12 @@ public class ContentViewCore implements MotionEventDelegate, NavigationClient {
         }
     }
 
+    public void setOverscrollResources(Bitmap edge, Bitmap glow) {
+        if (mNativeContentViewCore != 0 && edge != null && glow != null) {
+            nativeSetOverscrollResources(mNativeContentViewCore, edge, glow);
+        }
+    }
+
     @CalledByNative
     private void onBackgroundColorChanged(int color) {
         getContentViewClient().onBackgroundColorChanged(color);
@@ -2772,6 +2790,9 @@ public class ContentViewCore implements MotionEventDelegate, NavigationClient {
 
     private native void nativeSetBackgroundColor(int nativeContentViewCoreImpl, int color);
 
+    private native void nativeSetOverscrollResources(int nativeContentViewCoreImpl,
+            Bitmap edge, Bitmap glow);
+
     private native void nativeOnShow(int nativeContentViewCoreImpl);
     private native void nativeOnHide(int nativeContentViewCoreImpl);