Rename README.google to README.chromium.

build/README.google

Index: build/README.google
===================================================================
--- build/README.google	(revision 8952)
+++ build/README.google	(working copy)
@@ -1,15 +0,0 @@
-List of property sheets to be included by projects:
-  common.vsprops
-    Not used anymore. No-op. Kept for compatibility with current projects.
-
-  debug.vsprops
-    Enables debug settings. Must be included directly in Debug configuration. Includes internal\essential.vsprops.
-
-  external_code.vsprops
-    Contains settings made to simplify usage of external (non-Google) code. It relaxes the warning levels. Should be included after debug.vsprops or release.vsprops to override their settings.
-
-  output_dll_copy.rules
-    Run to enable automatic copy of DLL when they are as an input file in a vcproj project.
-
-  release.vsprops
-    Enables release settings. Must be included directly in Release configuration. Includes internal\essential.vsprops. Also includes "internal\release_impl$(CHROME_BUILD_TYPE).vsprops". So the behavior is dependant on the CHROME_BUILD_TYPE environment variable.