[android_webview] Add view integration test for content size.

android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java

Index: android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java
diff --git a/android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java b/android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java
index 9bd8eddfc6937ea0167d821e371868c8effbecfc..7e03d4fa394cc0231ab85b57dede02a6532eab46 100644
--- a/android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java
+++ b/android_webview/test/shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java
@@ -44,6 +44,10 @@ public class AwTestRunnerActivity extends Activity {
         setContentView(mLinearLayout);
     }
 
+    public int getRootLayoutWidth() {
+        return mLinearLayout.getWidth();
+    }
+
     /**
      * Adds a view to the main linear layout.
      */