Cleanup: Make namespace shell_integration_linux follow the style guide.

chrome/browser/shell_integration_linux.h

Index: chrome/browser/shell_integration_linux.h
diff --git a/chrome/browser/shell_integration_linux.h b/chrome/browser/shell_integration_linux.h
index 39eef4149eb9c812e1e236b99507099bbe8b948f..90808b6be05b55b7bb16fb6e2874924a2c2da321 100644
--- a/chrome/browser/shell_integration_linux.h
+++ b/chrome/browser/shell_integration_linux.h
@@ -17,7 +17,7 @@ class CommandLine;
 class Environment;
 }
 
-namespace ShellIntegrationLinux {
+namespace shell_integration_linux {
 
 // Get the path to write user-specific application data files to, as specified
 // in the XDG Base Directory Specification:
@@ -136,6 +136,6 @@ void DeleteDesktopShortcuts(const base::FilePath& profile_path,
 // for the profile in |profile_path|.
 void DeleteAllDesktopShortcuts(const base::FilePath& profile_path);
 
-}  // namespace ShellIntegrationLinux
+}  // namespace shell_integration_linux
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_LINUX_H_