Fix base:: namespace for Lock.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/6265018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72111 0039d316-1c4b-4281-b951-d872f2087c98

tools/memory_watcher/call_stack.cc

@@ -35,7 +35,7 @@ typedef BOOL (__stdcall *t_SymGetModuleInfo64)(HANDLE, DWORD64,
                                                PIMAGEHLP_MODULE64);
 
 // static
-Lock CallStack::dbghelp_lock_;
+base:Lock CallStack::dbghelp_lock_;
 // static
 bool CallStack::dbghelp_loaded_ = false;
 // static
@@ -373,7 +373,7 @@ void CallStack::ToString(PrivateAllocatorString* output) {
 }
 
 
-Lock AllocationStack::freelist_lock_;
+base::Lock AllocationStack::freelist_lock_;
 AllocationStack* AllocationStack::freelist_ = NULL;
 
 void* AllocationStack::operator new(size_t size) {

tools/memory_watcher/memory_hook.cc

@@ -275,7 +275,7 @@ static BOOL WINAPI Perftools_VirtualFreeEx(HANDLE process, LPVOID address,
   return patch_VirtualFreeEx()(process, address, size, type);
 }
 
-static Lock known_maps_lock;
+static base::Lock known_maps_lock;
 static std::map<void*, int> known_maps;
 
 static LPVOID WINAPI Perftools_MapViewOfFileEx(HANDLE hFileMappingObject,