Remove matcher to wait for static HTML view.

ios/chrome/test/earl_grey/chrome_earl_grey.h

Index: ios/chrome/test/earl_grey/chrome_earl_grey.h
diff --git a/ios/chrome/test/earl_grey/chrome_earl_grey.h b/ios/chrome/test/earl_grey/chrome_earl_grey.h
index 16897431cf2753c7a8da55d4bf6d5dcc372eadee..49043e1305b1e95eb6256b2a93a85bf97257acb8 100644
--- a/ios/chrome/test/earl_grey/chrome_earl_grey.h
+++ b/ios/chrome/test/earl_grey/chrome_earl_grey.h
@@ -54,6 +54,15 @@ id ExecuteJavaScript(NSString* javascript,
 // Taps html element with |elementID| in the current web view.
 + (void)tapWebViewElementWithID:(NSString*)elementID;
 
+// Waits for a static html view containing |text| if |present| is YES. If
+// |present| is NO, then it waits for there to be either no static html view,
+// or a static html view that does not contain |text|. If the condition is not
+// met, there is a GREYAssert.
++ (void)waitForStaticHTMLViewContainingText:(NSString*)text
+                              isTextPresent:(BOOL)present;

[baxley, 2017/03/31 20:59:22]

Let me know what you think about this API. The previous behavior was the
"contains" case was there is a static html view that contains |text|. The
negative of this was there is either no static html view, or the one that exists
doesn't contain the given text.

Let me know if this doesn't sound right, or you think the name/comment could be
better.

[Eugene But (OOO till 7-30), 2017/03/31 22:19:17]

It does not sounds like a canonical Objective-C name to me, which should read as
a sentence. I would create 2 public APIs instead:
+ (void)waitForStaticHTMLViewContainingText:(NSString*)text;
+ (void)waitForStaticHTMLViewNotContainingText:(NSString*)text;

Even if it means to have more code in the implementation.

[baxley, 2017/04/03 18:10:41]

Done.

+
+// Waits for a Chrome error page. If it is not found, a GREYAssert is induced.
++ (void)waitForErrorPage;
 @end
 
 #endif  // IOS_CHROME_TEST_EARL_GREY_CHROME_EARL_GREY_H_