New warning -> new pattern for fingers to learn for asserting failure.

The Ubuntu Clang compile bot has a warning enabled now that yells about !"foo"
before it breaks Chrome's build where the same warning is -Werror.

BUG=
R=reed@google.com

Review URL: https://codereview.chromium.org/23586002

git-svn-id: http://skia.googlecode.com/svn/trunk@10937 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/DrawPathTest.cpp b/tests/DrawPathTest.cpp
index 72ec158..f47b8c3 100644
--- a/tests/DrawPathTest.cpp
+++ b/tests/DrawPathTest.cpp
@@ -50,7 +50,7 @@
     if (canvas->readPixels(&output, x, y)) {
         REPORTER_ASSERT(reporter, 0 == pixel[0]);
     } else {
-        REPORTER_ASSERT(reporter, !"readPixels failed");
+        REPORTER_ASSERT_MESSAGE(reporter, false, "readPixels failed");
     }
 
     SkPaint paint;
@@ -65,7 +65,7 @@
         // appear the same.
         REPORTER_ASSERT(reporter, 0xFFFFFFFF == pixel[0]);
     } else {
-        REPORTER_ASSERT(reporter, !"readPixels failed");
+        REPORTER_ASSERT_MESSAGE(reporter, false, "readPixels failed");
     }
     surf->unref();
 }