Remove some unused code.

Found while tracking references to |onFinishGetGitmap|
Seems like Pedro found some dead code earlier but missed this part
BUG=651348

Change-Id: Ic93464abc91ae98dbf8eb9a92a641d162838b90e
Reviewed-on: https://chromium-review.googlesource.com/921862
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537898}

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/content/TabContentManager.java

@@ -7,7 +7,6 @@ package org.chromium.chrome.browser.compositor.layouts.content;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
-import android.util.SparseArray;
 import android.view.View;
 
 import org.chromium.base.CommandLine;
@@ -35,21 +34,8 @@ public class TabContentManager {
     private int[] mPriorityTabIds;
     private long mNativeTabContentManager;
 
-    /**
-     * A callback interface for decompressing the thumbnail for a tab into a bitmap.
-     */
-    public static interface DecompressThumbnailCallback {
-        /**
-         * Called when the decompression finishes.
-         * @param bitmap     The {@link Bitmap} of the content.  Null will be passed for failure.
-         */
-        public void onFinishGetBitmap(Bitmap bitmap);
-    }
-
     private final ArrayList<ThumbnailChangeListener> mListeners =
             new ArrayList<ThumbnailChangeListener>();
-    private final SparseArray<DecompressThumbnailCallback> mDecompressRequests =
-            new SparseArray<TabContentManager.DecompressThumbnailCallback>();
 
     private boolean mSnapshotsEnabled;
 
@@ -235,14 +221,6 @@ public class TabContentManager {
         }
     }
 
-    @CalledByNative
-    private void notifyDecompressBitmapFinished(int tabId, Bitmap bitmap) {
-        DecompressThumbnailCallback callback = mDecompressRequests.get(tabId);
-        mDecompressRequests.remove(tabId);
-        if (callback == null) return;
-        callback.onFinishGetBitmap(bitmap);
-    }
-
     /**
      * Invalidate a thumbnail if the content of the tab has been changed.
      * @param tabId The id of the {@link Tab} thumbnail to check.

chrome/browser/android/compositor/tab_content_manager.cc

@@ -191,18 +191,6 @@ void TabContentManager::DetachLiveLayer(int tab_id,
   }
 }
 
-void TabContentManager::OnFinishDecompressThumbnail(int tab_id,
-                                                    bool success,
-                                                    SkBitmap bitmap) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> java_bitmap;
-  if (success)
-    java_bitmap = gfx::ConvertToJavaBitmap(&bitmap);
-
-  Java_TabContentManager_notifyDecompressBitmapFinished(
-      env, weak_java_tab_content_manager_.get(env), tab_id, java_bitmap);
-}
-
 jboolean TabContentManager::HasFullCachedThumbnail(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,

chrome/browser/android/compositor/tab_content_manager.h

@@ -69,8 +69,6 @@ class TabContentManager : public ThumbnailCacheObserver {
   // make sure all live layers are detached.
   void DetachLiveLayer(int tab_id, scoped_refptr<cc::Layer> layer);
 
-  // Callback for when the thumbnail decompression for tab_id is done.
-  void OnFinishDecompressThumbnail(int tab_id, bool success, SkBitmap bitmap);
   // JNI methods.
   jboolean HasFullCachedThumbnail(
       JNIEnv* env,