[Mac] Fix omnibox text overlap

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h"
 
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
@@ skipping 21 matching lines @@
 // accidentally paste large amounts, so place a limit on what will be
 // accepted.
 //
 // 10k characters was arbitrarily chosen by seeing how much a text
 // field could handle in a single line before it started getting too
 // janky to recover from (jankiness was detectable around 5k).
 // www.google.com returns an error for searches around 2k characters,
 // so this is conservative.
 const NSUInteger kMaxPasteLength = 10000;
 
+// How much the text should be offset from its left.
+const CGFloat kTextXOffset = -1.0;
+
 // Returns |YES| if too much text would be pasted.
 BOOL ThePasteboardIsTooDamnBig() {
   NSPasteboard* pb = [NSPasteboard generalPasteboard];
   NSString* type =
       [pb availableTypeFromArray:[NSArray arrayWithObject:NSStringPboardType]];
   if (!type)
     return NO;
 
   return [[pb stringForType:type] length] > kMaxPasteLength;
 }
@@ skipping 540 matching lines @@
   NSAttributedString* selection =
       [self attributedSubstringForProposedRange:selectedRange
                                     actualRange:NULL];
   if (!selection)
     return;
 
   [[FindPasteboard sharedInstance] setFindText:[selection string]];
 }
 
 - (void)drawRect:(NSRect)rect {
+  gfx::ScopedNSGraphicsContextSaveGState saveGraphicsState;
   AutocompleteTextFieldObserver* observer = [self observer];
   if (observer)
     observer->OnBeforeDrawRect();
+
+  NSAffineTransform* transform = [NSAffineTransform transform];
+  [transform translateXBy:kTextXOffset yBy:0];
+  [transform concat];
+
   [super drawRect:rect];
   if (observer)
     observer->OnDidDrawRect();
 }
 
 // ThemedWindowDrawing implementation.
 
 - (void)windowDidChangeTheme {
   [self updateColorsToMatchTheme];
 }
 
 - (void)windowDidChangeActive {
 }
 
 @end