Fix tests to avoid page scale reset when setting page scale.

Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h

Index: Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h
diff --git a/Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h b/Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h
index b4fe5b8c83557b19213c7bc1836d91422a04b436..05a889528212486600cea91c3ab5e9684c09cbd9 100644
--- a/Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h
+++ b/Tools/DumpRenderTree/chromium/TestRunner/src/EventSender.h
@@ -86,7 +86,8 @@ public:
     void textZoomOut(const CppArgumentList&, CppVariant*);
     void zoomPageIn(const CppArgumentList&, CppVariant*);
     void zoomPageOut(const CppArgumentList&, CppVariant*);
-    void scalePageBy(const CppArgumentList&, CppVariant*);
+    void setInitialPageScaleOverride(const CppArgumentList&, CppVariant*);

[aelias_OOO_until_Jul13, 2013/07/08 00:53:20]

Instead of adding this new test-facing API, could you just make
EventSender::setPageScaleFactor call WebViewImpl::setInitialPageScaleOverride? 
The idea is that when a test explicitly sets the page scale factor, it should
stay there.

[wjmaclean, 2013/08/06 06:38:00]

Done.

+    void setPageScaleFactor(const CppArgumentList&, CppVariant*);
 
     void mouseDragBegin(const CppArgumentList&, CppVariant*);
     void mouseScrollBy(const CppArgumentList&, CppVariant*);