Pass format as argument to getContentBitmapAsync.

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

Index: content/public/android/java/src/org/chromium/content/browser/ContentReadbackHandler.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentReadbackHandler.java b/content/public/android/java/src/org/chromium/content/browser/ContentReadbackHandler.java
index ded0664c6296157b5f02f2260aacb8c15a4f64f0..ebffcb18e0f53f796ee84880542a0250b4de8f7f 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentReadbackHandler.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentReadbackHandler.java
@@ -81,7 +81,7 @@ public abstract class ContentReadbackHandler {
      * @param callback The callback to be executed after readback completes.
      */
     public void getContentBitmapAsync(float scale, Rect srcRect, ContentViewCore view,
-            GetBitmapCallback callback) {
+            Bitmap.Config config, GetBitmapCallback callback) {

[Yaron, 2015/03/25 14:13:56]

You need to update the javadoc accordingly

         if (!readyForReadback()) {
             callback.onFinishGetBitmap(null);
             return;
@@ -91,7 +91,7 @@ public abstract class ContentReadbackHandler {
         int readbackId = mNextReadbackId++;
         mGetBitmapRequests.put(readbackId, callback);
         nativeGetContentBitmap(mNativeContentReadbackHandler, readbackId, scale,
-                Bitmap.Config.ARGB_8888, srcRect.top, srcRect.left, srcRect.width(),
+                config, srcRect.top, srcRect.left, srcRect.width(),
                 srcRect.height(), view);
     }