Move creation and ownership of HostZoomMap to content instead of having every embedder do this.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
===================================================================
--- chrome/test/base/testing_profile.cc	(revision 122827)
+++ chrome/test/base/testing_profile.cc	(working copy)
@@ -69,7 +69,6 @@
 using base::Time;
 using content::BrowserThread;
 using content::DownloadManager;
-using content::HostZoomMap;
 using testing::NiceMock;
 using testing::Return;
 
@@ -656,10 +655,6 @@
   return speech_input_preferences_.get();
 }
 
-HostZoomMap* TestingProfile::GetHostZoomMap() {
-  return NULL;
-}
-
 std::wstring TestingProfile::GetName() {
   return std::wstring();
 }