Compute pageScaleFactor on page so that fixed layout page fits width of window.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index bc6b71bb715788b15071d13364961839b434184b..59acf4f4fcd267873257f756fead38dfea3533aa 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -45,6 +45,8 @@
           # Default setting for use_skia on mac platform.
           # This is typically overridden in use_skia_on_mac.gypi.
           'use_skia_on_mac%': 0,
+
+          'enable_viewport%': 0,

[darin (slow to review), 2012/01/12 19:18:02]

I may not be the best reviewer for this change.  It is conspicuous that no other
enable_XXX options are expressed here.  Why does this need to be handled
differently than other WebKit ENABLE_XXX options?

         },
         # Copy conditionally-set variables out one scope.
         'chromeos%': '<(chromeos)',
@@ -54,6 +56,7 @@
         'use_openssl%': '<(use_openssl)',
         'use_virtual_keyboard%': '<(use_virtual_keyboard)',
         'use_skia_on_mac%': '<(use_skia_on_mac)',
+        'enable_viewport%': '<(enable_viewport)',
 
         # Compute the architecture that we're building on.
         'conditions': [
@@ -103,6 +106,7 @@
       'use_ash%': '<(use_ash)',
       'use_openssl%': '<(use_openssl)',
       'use_virtual_keyboard%': '<(use_virtual_keyboard)',
+      'enable_viewport%': '<(enable_viewport)',
       'use_skia_on_mac%': '<(use_skia_on_mac)',
 
       # We used to provide a variable for changing how libraries were built.
@@ -382,6 +386,7 @@
     'enable_pepper_threading%': '<(enable_pepper_threading)',
     'chromeos%': '<(chromeos)',
     'use_virtual_keyboard%': '<(use_virtual_keyboard)',
+    'enable_viewport%': '<(enable_viewport)',
     'use_skia_on_mac%': '<(use_skia_on_mac)',
     'use_xi2_mt%':'<(use_xi2_mt)',
     'file_manager_extension%': '<(file_manager_extension)',
@@ -1078,6 +1083,9 @@
       ['enable_pepper_threading==1', {
         'defines': ['ENABLE_PEPPER_THREADING'],
       }],
+      ['enable_viewport==1', {
+        'defines': ['ENABLE_VIEWPORT'],
+      }],
       ['configuration_policy==1', {
         'defines': ['ENABLE_CONFIGURATION_POLICY'],
       }],