aw: Force auxiliary bitmap on android emulators

android_webview/native/java_browser_view_renderer_helper.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/native/java_browser_view_renderer_helper.h"
 
 #include <android/bitmap.h>
 
 #include "android_webview/public/browser/draw_sw.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 134 matching lines @@
 }  // namespace
 
 void RasterHelperSetAwDrawSWFunctionTable(AwDrawSWFunctionTable* table) {
   g_sw_draw_functions = table;
 }
 
 // static
 scoped_ptr<SoftwareCanvasHolder> SoftwareCanvasHolder::Create(
     jobject java_canvas,
     const gfx::Vector2d& scroll_correction,
-    const gfx::Size& auxiliary_bitmap_size) {
+    const gfx::Size& auxiliary_bitmap_size,
+    bool force_auxiliary_bitmap) {
   JNIEnv* env = base::android::AttachCurrentThread();
-  scoped_ptr<SoftwareCanvasHolder> holder(
-      new JavaCanvasHolder(env, java_canvas, scroll_correction));
-  if (!holder->GetCanvas()) {
+  scoped_ptr<SoftwareCanvasHolder> holder;
+  if (!force_auxiliary_bitmap) {
+    scoped_ptr<SoftwareCanvasHolder> holder(
+        new JavaCanvasHolder(env, java_canvas, scroll_correction));
+  }
+  if (!holder.get() || !holder->GetCanvas()) {
     holder.reset();
     holder.reset(new AuxiliaryCanvasHolder(env, java_canvas, scroll_correction,
                                            auxiliary_bitmap_size));
   }
   if (!holder->GetCanvas()) {
     holder.reset();
   }
   return holder;
 }
 
 bool RegisterJavaBrowserViewRendererHelper(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android_webview