[Android] Install a WebContentsObserverAndroid in android_webview.

[Android] Install a WebContentsObserverAndroid in android_webview.

To proxy WebContentsObserverAndroid calls to the embedder, we need
to create an instance of the observer.

Android trybots are green and only touches java, so no need for CQ to look at other bots.
NOTRY=true

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=158306

[benm (inactive), 2012-09-24 15:05:39]

ptal

[mkosiba (inactive), 2012-09-24 15:08:52]

lgtm

http://codereview.chromium.org/10969071/diff/1/android_webview/java/src/org/c...
File android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
(right):

http://codereview.chromium.org/10969071/diff/1/android_webview/java/src/org/c...
android_webview/java/src/org/chromium/android_webview/AwContentsClient.java:133:
if (mWebContentsObserver == null) {
throw if != null ?

[benm (inactive), 2012-09-24 15:11:18]

http://codereview.chromium.org/10969071/diff/1/android_webview/java/src/org/c...
File android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
(right):

http://codereview.chromium.org/10969071/diff/1/android_webview/java/src/org/c...
android_webview/java/src/org/chromium/android_webview/AwContentsClient.java:133:
if (mWebContentsObserver == null) {
yeah, after I uploaded I thought about asserting == null rather than having the
if...

[Yusuf, 2012-09-24 17:31:04]

lgtm

[commit-bot: I haz the power, 2012-09-24 17:31:47]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/benm@chromium.org/10969071/5001

[commit-bot: I haz the power, 2012-09-24 17:31:57]

Change committed as 158306