[Android WebView] Don't cache bitmap used for SW draw.

Caching the bitmap creates a problem when we have more than one
WebView on the screen at once, as they end up sharing the same
Bitmap.

BUG=

Review URL: https://chromiumcodereview.appspot.com/16833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@206019 0039d316-1c4b-4281-b951-d872f2087c98

android_webview/browser/in_process_view_renderer.cc

@@ -406,7 +406,7 @@ bool InProcessViewRenderer::DrawSWInternal(jobject java_canvas,
   if (pixels == NULL) {
     TRACE_EVENT0("android_webview", "Render to Aux Bitmap");
     ScopedJavaLocalRef<jobject> jbitmap(java_helper_->CreateBitmap(
-        env, clip.width(), clip.height(), true));
+        env, clip.width(), clip.height(), false));
     if (!jbitmap.obj()) {
       TRACE_EVENT_INSTANT0("android_webview", "Bitmap Alloc Fail",
                            TRACE_EVENT_SCOPE_THREAD);