Remove "from all browsers" memory details mode

chrome/browser/memory_details.h

Index: chrome/browser/memory_details.h
diff --git a/chrome/browser/memory_details.h b/chrome/browser/memory_details.h
index c8820e774e9eba6e1a2a4e644cea5602824e6728..7cd017dedc98b82e7b178b460accbccae26a29f4 100644
--- a/chrome/browser/memory_details.h
+++ b/chrome/browser/memory_details.h
@@ -112,20 +112,13 @@ struct ProcessData {
 //    }
 class MemoryDetails : public base::RefCountedThreadSafe<MemoryDetails> {
  public:
-  enum CollectionMode {
-    // Collect metrics from Chrome and other running browsers.
-    FROM_ALL_BROWSERS,
-    // Collect metrics from Chrome processes only.
-    FROM_CHROME_ONLY
-  };
-
   // Constructor.
   MemoryDetails();
 
-  // Initiate updating the current memory details (based on |mode|).  These are
-  // fetched asynchronously because data must be collected from multiple
-  // threads. OnDetailsAvailable will be called when this process is complete.
-  void StartFetch(CollectionMode mode);
+  // Initiate updating the current memory details.  These are fetched
+  // asynchronously because data must be collected from multiple threads.
+  // OnDetailsAvailable will be called when this process is complete.
+  void StartFetch();
 
   virtual void OnDetailsAvailable() = 0;
 
@@ -155,7 +148,7 @@ class MemoryDetails : public base::RefCountedThreadSafe<MemoryDetails> {
   // on that thread.  The data will be used by about:memory.  When finished,
   // invokes back to the file thread to run the rest of the about:memory
   // functionality.
-  void CollectChildInfoOnIOThread(CollectionMode mode);
+  void CollectChildInfoOnIOThread();
 
   // Collect current process information from the OS and store it
   // for processing.  If data has already been collected, clears old
@@ -164,7 +157,6 @@ class MemoryDetails : public base::RefCountedThreadSafe<MemoryDetails> {
   // and is fairly expensive to run, hence it's run on the blocking pool.
   // The parameter holds information about processes from the IO thread.
   void CollectProcessData(
-      CollectionMode mode,
       const std::vector<ProcessMemoryInformation>& child_info);
 
   // Collect child process information on the UI thread.  Information about