[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

Review URL: https://chromiumcodereview.appspot.com/11196016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162360 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed