Replace string16 with base::string16.

chrome/browser/download/download_item_model.h

Index: chrome/browser/download/download_item_model.h
diff --git a/chrome/browser/download/download_item_model.h b/chrome/browser/download/download_item_model.h
index 05a1023f5c32b653a665c9e4e71539f078a632e1..041981388f312cf4ddf69ca6f9fe0f32960573dd 100644
--- a/chrome/browser/download/download_item_model.h
+++ b/chrome/browser/download/download_item_model.h
@@ -37,14 +37,14 @@ class DownloadItemModel {
 
   // Returns a long descriptive string for a download that's in the INTERRUPTED
   // state. For other downloads, the returned string will be empty.
-  string16 GetInterruptReasonText() const;
+  base::string16 GetInterruptReasonText() const;
 
   // Returns a short one-line status string for the download.
-  string16 GetStatusText() const;
+  base::string16 GetStatusText() const;
 
   // Returns the localized status text for an in-progress download. This
   // is the progress status used in the WebUI interface.
-  string16 GetTabProgressStatusText() const;
+  base::string16 GetTabProgressStatusText() const;
 
   // Returns a string suitable for use as a tooltip. For a regular download, the
   // tooltip is the filename. For an interrupted download, the string states the
@@ -55,17 +55,17 @@ class DownloadItemModel {
   // |font_list| and |max_width| are used to elide the filename and/or interrupt
   // reason as necessary to keep the width of the tooltip text under
   // |max_width|. The tooltip will be at most 2 lines.
-  string16 GetTooltipText(const gfx::FontList& font_list, int max_width) const;
+  base::string16 GetTooltipText(const gfx::FontList& font_list, int max_width) const;
 
   // Get the warning text to display for a dangerous download. The |base_width|
   // is the maximum width of an embedded filename (if there is one). The metrics
   // for the filename will be based on |font_list|. Should only be called if
   // IsDangerous() is true.
-  string16 GetWarningText(const gfx::FontList& font_list, int base_width) const;
+  base::string16 GetWarningText(const gfx::FontList& font_list, int base_width) const;
 
   // Get the caption text for a button for confirming a dangerous download
   // warning.
-  string16 GetWarningConfirmButtonText() const;
+  base::string16 GetWarningConfirmButtonText() const;
 
   // Get the number of bytes that has completed so far. Virtual for testing.
   int64 GetCompletedBytes() const;
@@ -146,10 +146,10 @@ class DownloadItemModel {
   // MB" where the numerator is the transferred size and the denominator is the
   // total size. If the total isn't known, returns the transferred size as a
   // string (e.g.: "100 MB").
-  string16 GetProgressSizesString() const;
+  base::string16 GetProgressSizesString() const;
 
   // Returns a string indicating the status of an in-progress download.
-  string16 GetInProgressStatusString() const;
+  base::string16 GetInProgressStatusString() const;
 
   // The DownloadItem that this model represents. Note that DownloadItemModel
   // itself shouldn't maintain any state since there can be more than one