Photo Picker Dialog: Use sandboxed utility process for decoding images.

chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
index 70d18a837fd8316262c9c3918ccda1a786811a35..a8d34131650d87a73e386b5fd3780d7fa470dee4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
@@ -5,9 +5,6 @@
 package org.chromium.chrome.browser.photo_picker;
 
 import android.graphics.Bitmap;
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.Paint;
 import android.support.v7.widget.RecyclerView.ViewHolder;
 import android.text.TextUtils;
 
@@ -16,7 +13,8 @@ import java.util.List;
 /**
  * Holds on to a {@link PickerBitmapView} that displays information about a picker bitmap.
  */
-public class PickerBitmapViewHolder extends ViewHolder {
+public class PickerBitmapViewHolder
+        extends ViewHolder implements DecoderServiceHost.ImageDecodedCallback {
     // Our parent category.
     private PickerCategoryView mCategoryView;
 
@@ -35,11 +33,9 @@ public class PickerBitmapViewHolder extends ViewHolder {
         mItemView = itemView;
     }
 
-    /**
-     * The notification handler for when an image has been decoded.
-     * @param filePath The file path for the newly decoded image.
-     * @param bitmap The results of the decoding (or placeholder image, if failed).
-     */
+    // DecoderServiceHost.ImageDecodedCallback
+
+    @Override
     public void imageDecodedCallback(String filePath, Bitmap bitmap) {
         if (bitmap == null || bitmap.getWidth() == 0 || bitmap.getHeight() == 0) {
             return;
@@ -71,25 +67,8 @@ public class PickerBitmapViewHolder extends ViewHolder {
 
         // TODO(finnur): Use cached image, if available.
 
-        // TODO(finnur): Use decoder instead.
         int size = mCategoryView.getImageSize();
-        imageDecodedCallback(mBitmapDetails.getFilePath(), createPlaceholderBitmap(size, size));
-    }
-
-    /**
-     * Creates a placeholder bitmap.
-     * @param width The requested width of the resulting bitmap.
-     * @param height The requested height of the resulting bitmap.
-     * @return Placeholder bitmap.
-     */
-    // TODO(finnur): Remove once the decoder is in place.
-    private Bitmap createPlaceholderBitmap(int width, int height) {
-        Bitmap placeholder = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
-        Canvas canvas = new Canvas(placeholder);
-        Paint paint = new Paint();
-        paint.setColor(Color.GRAY);
-        canvas.drawRect(0, 0, (float) width, (float) height, paint);
-        return placeholder;
+        mCategoryView.getDecoderServiceHost().decodeImage(mBitmapDetails.getFilePath(), size, this);
     }
 
     /**