[Android WebView] Fix some findbugs warnings.

[Android WebView] Fix some findbugs warnings.

M D DLS: Dead store to imageUrl in
org.chromium.android_webview.test.AwContentsClientShouldInterceptRequestTest.testCalledForImage()
At AwContentsClientShouldInterceptRequestTest.java
M D DLS: Dead store to onPageFinishedCallCount in
org.chromium.android_webview.test.AwContentsClientShouldInterceptRequestTest.testOnLoadResourceCalledWithCorrectUrl()
At AwContentsClientShouldInterceptRequestTest.java
M D SF: Switch statement found in
org.chromium.android_webview.AwContents$IoThreadClientHandler.handleMessage(Message)
where default case is missing  At AwContents.java
M P SIC: Should
org.chromium.android_webview.test.AwContentsClientShouldIgnoreNavigationTest$TestAwContentsClient$ShouldIgnoreNavigationHelper
be a _static_ inner class?  At
AwContentsClientShouldIgnoreNavigationTest.java

Java only change and android bots are happy.
NOTRY=true

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=162360

[benm (inactive), 2012-10-17 10:54:09]

ptal

[mkosiba (inactive), 2012-10-17 12:13:46]

lgtm

[commit-bot: I haz the power, 2012-10-17 12:17:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/benm@chromium.org/11196016/1

[commit-bot: I haz the power, 2012-10-17 12:18:04]

Change committed as 162360