Add ContextMenu support upstream for Android

chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java

Index: chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
diff --git a/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java b/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
index 41585059d0ac3b8837d4826ca776d4bb82c0a74a..0680e39a195c924c0030748960bdfacc42572275 100644
--- a/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
+++ b/chrome/android/testshell/javatests/src/org/chromium/chrome/testshell/ChromiumTestShellTestBase.java
@@ -134,4 +134,21 @@ public class ChromiumTestShellTestBase extends
         });
         waitForActiveShellToBeDoneLoading();
     }
+
+    // TODO(aelias): This method needs to be removed once http://crbug.com/179511 is fixed.
+    // Meanwhile, we have to wait if the page has the <meta viewport> tag.
+    /**
+     * Waits till the ContentViewCore receives the expected page scale factor
+     * from the compositor and asserts that this happens.
+     */
+    protected void assertWaitForPageScaleFactorMatch(final float expectedScale)
+            throws InterruptedException {
+        assertTrue(CriteriaHelper.pollForCriteria(new Criteria() {
+            @Override
+            public boolean isSatisfied() {
+                return getActivity().getActiveTab().getContentViewCore().getScale() ==
+                        expectedScale;
+            }
+        }));
+    }
 }